Dunkirk Weather,May 1940

Credit where credit is due: Obviously, these alternate histories always owe a great deal to the many history writers whose books I’ve read. Sometimes the speculation owes so much to one source that I feel that it is only fair to mention that fact up front. The inspiration for these scenarios is the excellent book Battling the Elements: Weather and Terrain in the Conduct of War by Harold A. Winters.

What actually happened: In late May of 1940, with the bulk of the English army and the best of the French army trapped with their backs to the sea in Dunkirk, a moderately unusual weather pattern occurred. First, it rained heavily. That made German tanks less mobile. Then the weather remained cloudy enough to ground the Luftwaffe for the bulk of several days. At the same time, the winds in the English Channel remained calm, allowing small watercraft to cross safely and help in the evacuation. The Allies got a gift from the weather that lasted the bulk of five days and made the process of evacuation from the trap they were in much easier.

What might have happened: The proverbial butterfly in Mongolia flaps its wings and causes a cascade of events which eventually causes the favorable Dunkirk weather to be a week late or two weeks early, or not happen at all. I’m going to do three scenarios based on changes in the timing of that weather. The first appears here and looks at what would have happened if the Allied-friendly weather had arrived too late or not at all. The second looks at what would have happened if the drenching rains and clouds had arrived on May 12 (two weeks early), two days into the German offensive. The third one also has the Allied friendly weather arriving two weeks early, but this time German weather forecasters see it coming and Hitler postpones the offensive from May 10 to May 17. Scenarios two and three will probably appear in future POD’s.

Scenario One: Evacuation-friendly weather doesn’t arrive over Dunkirk. The weather alternates between stormy and mercilessly clear. The channel is choppy to stormy most of those five days, making it risky for smaller craft to come across, and making it more risky for larger ones. That has several consequences, all bad for the Allies. First, the Allied lines defending Dunkirk collapse more quickly because of German close air support, so there is less time for the evacuation. In some units, hard-pressed Allied morale would collapses entirely, with officers melting away and troops throwing away their weapons and racing each other for places on the few remaining ships out. That happened in our time-line to many units. Second, the Luftwaffe takes a heavy toll on Allied shipping, sinking British and French destroyers loaded with troops. They also destroy port facilities at Dunkirk more thoroughly than in our time-line, making evacuation even more difficult and dangerous. The high surf makes it nearly impossible to take troops off from the beaches and keeps the British fleet of small boats at home. The high winds make two out of the three routes by which large ships can get to Dunkirk nearly impassible. The third route involves running a gauntlet of German shore-based guns. Third, the British are forced to spend scarce fighter planes recklessly to keep the Luftwaffe from totally annihilating the evacuating troops. The British Spitfires take their toll on German planes, but Spitfires get shot down too, and downed British pilots don’t find it as easy to get back and fight another day as they did in our time-line’s Battle of Britain.

The bottom line: Thousands of British troops still escape. The evacuation still manages to take off an average of seven to eight thousand troops per day May 26th through May 30th, plus another four thousand early in the very early morning hours of June 1st as the Germans close in on the remainder. Nearly two hundred thousand British troops who got away in our time-line are killed or captured in this one. The French lose almost all of their best army, with over a hundred thousand additional fatalities or POWs. The British navy takes a pounding, losing over a dozen additional destroyers to the Luftwaffe. The British airforce is also hurt badly, losing scarce modern fighter planes and, more importantly, scarce pilots.

The greater magnitude of the disaster saps French morale and allied cohesion. The French had wanted to try to maintain a beachhead at Dunkirk to tie up German forces which would otherwise be freed up to attack south into France. The French blame the British for triggering the collapse of that scheme by pushing for evacuation rather than a beachhead. The Reynaud government is closely associated with the British in the public mind. It collapses, and by June 3rd, the new French government is trying to get out of the war. The French are bitter at Britain for holding back their fighters until it was too late for them to stop the defeat, as well as for starting the Dunkirk evacuation before even telling the French that they were planning it. The French also want to see if they can salvage anything from the defeat.

The Italians jump into the war on Germany’s side on June 3rd, not much before they did in our time-line. They tie down some French troops, but not many. Italian intervention is the last straw for the French government though, and they sign a humiliating peace on June 8th. The British are now fighting alone.

The Germans expect the British to quickly ask for terms also. There is actually considerable support for that in England. British morale is low. The dominant images of Dunkirk both in England and throughout the world, are of the Luftwaffe sinking ships crowded with troops and of English and French troops fighting for places on last ships out. Churchill is too much of a fighter to sue for peace though, and he is still too popular to displace. He presides over a country with very little left to fight with—very little in the way of a trained army, an airforce short of planes and pilots, and a navy hurt enough by the evacuation efforts that it will have trouble keeping the sealanes to England open.

The magnitude of the British defeat at Dunkirk, and especially the perception of British weakness that it creates, opens up a can of worms. Across the Middle East, Arab nationalists see an opportunity to gain real independence. So do Indian nationalists. Japan eyes the vulnerable Far Eastern possessions of France, England, and the Netherlands hungrily. The Soviet Union also sees potential for expansion in British weakness. Franco of Spain is a very cautious man, but even he sees potential for gains in Morocco and in possibly retaking Gibraltar. Even Argentina quietly calculates the chances of acquiring the Falkland Islands from Britain, and evaluates the impact of confiscating British property in Argentina. British weakness plays a role in attracting this unwelcome attention to the empire, but so does the greater perception of weakness. Potential enemies of England see or hear of the images of Dunkirk and decide that England has gone soft.

The perception of British weakness also causes her friends to have second thoughts. South Africa edges away from participation in the war. Turkey quietly exits a defensive pact with England and France against Italy. In the US, the Roosevelt administration looks closely at whether or not England can survive. There is a strong school of thought in the administration that says that sending war supplies to England is futile—that the English have decayed from within and would not be able to use such supplies effectively. There is also a growing feeling that such supplies may soon be needed at home. Roosevelt vacillates on that question, waiting for events to determine that issue one way or the other. Even the most loyal Commonwealths, like Australia and Canada, quietly start evaluating their security position if England is no longer able to protect them. They become slightly but definitely more reluctant to send their military assets abroad to threatened areas of the empire.

The rapid German defeat of the British and French armies gives Hitler a new batch of friends. Almost every little country or nationality in Europe scrambles to find a place in the new order of things. In too many places, the rapid defeat of England and France is read as a sign of the decadence of western style democracy, and the strength of Fascism. Fascist parties grow and become more vocal throughout Europe, and South America. Even in England and to a lesser extent the US, local fascists trumpet the defeat as a sign that western style democracy is weak and decadent. Even some people bitterly opposed to Hitler advocate using elements of Fascist and Nazi techniques to shore up the power of those countries still opposing him.

The Germans are actually as shocked and unprepared for their sudden victory as everybody else is. Hitler expects the British to follow the French to the negotiating table, but he begins preparing for an invasion of England in case that proves necessary. The Italians are already grabbing scraps of English and French territory in east Africa. They grab French and British Somalia and start moving hesitantly into Egypt from Libya, and into the Sudan from Ethiopia. The Italians are very poorly prepared for war, but they face minimal opposition. The South African government is very reluctant to get its forces involved. The Australians, who in our time-line provided a major part of Commonwealth Forces in North Africa, are suddenly faced with a military threat of their own.

That threat comes from Japan, which demands that the British and French stop supplying arms to the Nationalist Chinese through Burma and French Indochina. They back up that demand with threatening troop movements, then up the ante by demanding that the French allow armed Japanese inspectors at Indochina’s ports. That quickly escalates into a creeping takeover of Indochina. The British are very concerned that their colonies in the area are next. That concern is strengthened by small-scale Japanese raids into Burma to destroy supplies meant for the Nationalist Chinese.

Churchill is faced with a dilemma in dealing with Japan. England cannot afford another war at this point, but at the same time Churchill knows that making concessions to the Japanese at a time England appears to be weak will only lead to more demands. He tries to have it both ways by rerouting arms slated for the Nationalist Chinese to strengthen British Empire defenses in the area. The Japanese are not impressed, and begin the "armed inspectors" game with Hong Kong. They also demand oil on very favorable terms from the Dutch East Indies.

England is in a downward spiral. Every time they appear weak, they actually become weaker, because their friends edge away and their enemies are emboldened. Even Greece and Turkey get into the act, with both countries quietly pressing their claims on British-held Cyprus, and quietly preparing to seize it if conditions appear right. The Turks also raise their claim to the Mosul area in Iraq, and quietly get ready to seize it.

The perception is spreading that the British Empire is now a military vacuum, and that the only real question is who will grab the pieces. That is a very dangerous perception, because it can easily become reality. It does. Arab nationalists seize power in Iraq. The Turks move into northern Iraq to protect their claim to Mosul. In late June 1940, with a German invasion looming and with very few trained men to meet that invasion, England can do little to restore the situation. The Italians invading Egypt are poorly trained and led, but England has very little to oppose them given the other security needs it faces. Arab nationalists in Egypt look at the Italian force moving into Egypt, and decide that they have to move fast in order to take power before the Italians do. In early July, as the Luftwaffe begins large-scale raids in England, the Egyptian nationalists revolt.

The Italians have been moving very cautiously, but with the British Empire apparently collapsing, they push forward more aggressively. Japan quickly takes a harder line in the Far East, and even begin quietly sending weapons to the Iraqi rebels. They actually tried to do that in our time-line during a later Iraqi revolt.

The perception that their empire is collapsing jolts the British leadership. Churchill is ousted and the new leadership begins negotiations with Hitler through Swedish intermediaries. That proves to be a mistake. The fact that negotiations are going on does not remain secret. The Japanese want a seat at the table, and they quickly begin seizing British and Dutch possessions in the Far East to give them that seat. Indian nationalists also want their concerns reflected, and they also launch a revolt. Spain wants a seat at the table. Franco declares war on England, begins a siege of Gibraltar and allows German submarines and aircraft to base themselves in the Canary Islands. The Soviets build up for an invasion of northern Iran, but the Germans react very strongly against that, and the Soviets content themselves for the time being with grabbing off parts of northern Afghanistan.

Given the weakened state of the empire, British negotiators are pleasantly surprised at the terms Hitler offers. The British lose Malta to the Italians, and are forced to give up claim to British Somalia, and the southern third of the Sudan. They are also forced to "internationalize" control of the Suez Canal, with Italian and German troops stationed in the Canal Zone alongside British troops. The issue of Gibraltar is left in limbo; to be settled in further negotiations between the parties directly involved. The same is true of Cyprus. In the Far East, the Japanese have their control of Hong Kong confirmed. The Japanese also keep Indochina, Indonesia, and parts of eastern Burma. Germany gets their old colony of Tanganyika in East Africa back, but doesn’t press claims to their other old colonies, which are now controlled by England or France. Franco gets minor border adjustments between the French and Spanish parts of Morocco for his late entry into the war. The Turks get Mosul for their troubles. The claims of the Arab and Indian nationalists are ignored.

Hitler compensates France and England by awarding them pieces of the Belgian Congo. He also takes a slice to add to his East African holdings. The British get some minor slices of the former Netherlands East Indies too.

The British armed forces are limited by treaty, but those limitations don’t appear too restrictive. The British are allowed to build their army back up to its prewar level, though there are restrictions on the number and weight of British tanks. They are allowed to maintain their current fighter force levels, but are not allowed to build any new heavy bombers. The Royal Navy will gradually retire older vessels over a period of five years to reach the ratio of tonnage with Germany specified in existing treaties—Germany can have up to 40% of the tonnage that England has. The British are forced to allow German and Italian Armistice inspectors in to insure that the British are complying with the treaty. They are also forced to pay for any damages to German property, including shipping that was damaged during the war and to pay the expenses of Armistice inspectors. The British are forced to dismantle tariffs and restrictions on investment between the two countries and their empires, and to compensate the Germans and Italians in kind for Axis merchant shipping lost during the war. If Hitler was an honorable man, it really wouldn’t have been a bad treaty from England’s standpoint.

World War II is over. The British and French concentrate on consolidating the remainders of their empires, and dealing with the economic problems caused by the war and by the cost of paying Hitler his reparations. Hitler wants to turn east and destroy the Soviet Union in the autumn of 1940, but his generals manage to convince him that it will be too late in the season to do that by the time he gets his military geared up. He decides to wait for spring. In the meantime, he quietly works to exploit the potential of the treaty to reduce England to a German dependency. German Armistice inspectors become more numerous and more aggressive in their inspections as the summer and fall of 1940 go on, demanding access to British factories, military bases, and even radar stations. German air and submarine bases appear in the Canary Islands, then in Iceland and Greenland.

Germany rebuilds the airborne forces decimated in the 1940 campaigns, and posts them in the Low Countries. German "tourists" and "industrialists" become increasingly common in England and in the English Empire. German industry moves slowly, but relentlessly into British overseas markets. Those markets are already being attacked by strong American competitors. German firms buy out British firms hurt by the competition with money from the British war reparations. British finances are already in sad shape. The German competition combines with the expense of quelling the rebellions in India and the Middle East and of war reparations to make it very difficult for England to maintain its current armed forces, much less modernize them and bring them up to even the limits allowed under the armistice.

Britain takes on the look and feel of a defeated and occupied country, even though there are no German military forces other than the Armistice inspectors in the country. The scope of those inspections gradually increases as autumn and fall of 1940 wear on. British citizens see more and more men in German and Italian uniforms prowling through streets, factories and bases more and more. They begin feel like they are a defeated and occupied country. That perception makes it harder to resist further erosion of British sovereignty, as a small, but growing number of British citizens try to accommodate to and exploit the new power center in their lives.

And that’s where the story goes if I decide to do one. What do you think? The scenario depends very heavily on perceptions and morale. Those are very hard to predict. If the British had come away from Dunkirk with the perception that they were defeated, and if the rest of the world had come away with that same perception, then I say the British would have been defeated in 1940. The successful evacuation gave them the illusion of victory, and dimmed worldwide perceptions of German invincibility. With the exception of Italy, the jackals didn’t leap onto the carcass of the empire, and the British were able to regain their power.


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