The Phoney War (French: Drôle de guerre; German: Sitzkrieg) was an eight-month period at the start of World War II, during which there was only one limited military land operation on the Western Front, when French troops invaded Germany's Saar district. Nazi Germany carried out the Invasion of Poland on 1 September 1939; the Phoney period began with the declaration of war by the United Kingdom and France against Nazi Germany on 3 September 1939, after which little actual warfare occurred, and ended with the German invasion of France and the Low Countries on 10 May 1940. Although there was no large-scale military action by Britain and France, they did begin some economic warfare, especially with the naval blockade, and shut down German surface raiders. They created elaborate plans for numerous large-scale operations designed to cripple the German war effort. These included opening an Anglo-French front in the Balkans, invading Norway to seize control of Germany's main source of iron ore and a strike against the Soviet Union, to cut off its supply of oil to Germany. Only the Norway plan came to fruition, and by April 1940, it was too little, too late.
The quiet of the Phoney War was punctuated by a few Allied actions. In the Saar Offensive in September, the French attacked Germany with the intention of assisting Poland, but it fizzled out within days and they withdrew. In November, the Soviets attacked Finland in the Winter War, resulting in much debate in France and Britain about an offensive to help Finland, but the forces finally assembled for this campaign were delayed until it ended in March. The Allied discussions about a Scandinavian campaign caused concern in Germany and resulted in the German invasion of Denmark and Norway in April, and the Allied troops previously assembled for Finland were redirected to Norway instead. Fighting there continued until June when the Allies evacuated, ceding Norway to Germany in response to the German invasion of France.
On the Axis side, the Germans launched attacks at sea in the autumn and winter against British aircraft carriers and destroyers, sinking several including the carrier HMS Courageous with the loss of 519 lives. Action in the air began on 16 October 1939 when the Luftwaffe launched air raids on British warships. There were various minor bombing raids and reconnaissance flights on both side.
The initial term used by British people for this period was Bore War; later, the Americanism Phoney War became used by both sides of the Atlantic. The term Phoney War customarily appears using the British spelling even in North America, rather than the American phony, although some American sources do not follow the pattern. The first known recorded use of the term in print was in September 1939, in a US newspaper which used the British spelling, although other contemporary American reports sometimes used "phony" since both spellings were in use at the time in the US. The term appeared in Great Britain by January 1940 as "phoney", the only acceptable spelling there.
The Phoney War was also referred to as the "Twilight War" (by Winston Churchill) and as the Sitzkrieg ("the sitting war": a word play on blitzkrieg created by the British press). In French, it is referred to as the drôle de guerre ("funny" or "strange" war).[a]
While most of the German army was engaged in Poland, a much smaller German force manned the Siegfried Line, their fortified defensive line along the French border. At the Maginot Line on the other side of the border, British and French troops stood facing them, but there were only some local, minor skirmishes, while in the air there were occasional dogfights between fighter planes. The Royal Air Force dropped propaganda leaflets on Germany and the first Canadian troops arrived in Britain, while western Europe was under a period of uneasy calm for seven months.
In the first few months of the war, Germany still hoped to persuade Britain to agree to peace. Although London hospitals prepared for 300,000 casualties in the first week, Germany unexpectedly did not immediately attack British cities by air, and German pilots that attacked Scottish naval bases said that they would have been court-martialled and executed for bombing civilians. Both sides found that attacks on military targets, such as a British attack on Kiel on the second night of the war, led to high losses of aircraft. They also feared retaliation for bombing civilians. (Britain and France did not realise that Germany used 90% of its frontline aircraft during the Polish invasion.) Civilian attitudes in Britain to their German foes were still not as intense as they were to become after the Blitz. On 30 April 1940, a German Heinkel 111 bomber crashed at Clacton-on-Sea in Essex, killing its crew and injuring 160 people on the ground. The crew were laid to rest in the local cemetery with support from the Royal Air Force. Wreaths with messages of sympathy were displayed on the coffins. British pilots mapped the Siegfried Line while German troops waved at them.
When Leopold Amery suggested to Kingsley Wood that the Black Forest be bombed with incendiaries to burn its ammunition dumps, Wood—the Secretary of State for Air—amazed the member of parliament by responding that the forest was "private property" and could not be bombed; neither could weapons factories, as the Germans might do the same. Some British officers in France imported packs of foxhounds and beagles in 1939, but were thwarted by the French authorities in their attempts at introducing live foxes.
In their hurry to re-arm, Britain and France both bought large amounts of weapons from manufacturers in the US at the outbreak of hostilities, supplementing their own production. The non-belligerent US contributed to the Western Allies by discounted sales.
Despite the relative calm on land, on the high seas, the war was very real. Within a few hours of the declaration of war, the British liner SS Athenia was torpedoed off the Hebrides with the loss of 112 lives in what was to be the beginning of the long-running Battle of the Atlantic. On 4 September, the Allies announced a blockade of Germany to prevent her importing food and raw materials to sustain her war effort; the Germans immediately declared a counter-blockade while Soviet Union helped Germany with supplies bypassing the blockade. RAF Bomber Command, Britain's principal offensive arm, was also heavily engaged, but found that daylight bombing caused little damage and cost insupportable losses (e.g., 12 out of 22 Wellington bombers were shot down in an air battle over the Wilhelmshaven naval base on 18 December 1939.)
At the Nuremberg trials, German military commander Alfred Jodl said that "if we did not collapse already in the year 1939 that was due only to the fact that during the Polish campaign, the approximately 110 French and British divisions in the West were held completely inactive against the 23 German divisions." General Siegfried Westphal stated that if the French had attacked in force in September 1939 the German army "could only have held out for one or two weeks."
The Saar Offensive was a French attack into the Saarland defended by the German 1st Army. Its purpose was to assist Poland. The assault was stopped after a few kilometres and the French forces withdrew. According to the Franco-Polish military convention, the French Army was to start preparations for a major offensive three days after the beginning of mobilisation. The French forces were to effectively gain control over the area between the French border and the German lines and were to probe the German defences. On the 15th day of the mobilisation (that is on 16 September), the French Army was to start a full-scale assault on Germany. The preemptive mobilisation was started in France on 26 August, and on 1 September full mobilisation was declared.
The offensive in the Rhine river valley area started on 7 September, four days after France declared war on Germany. Since the Wehrmacht was occupied in the attack on Poland, the French soldiers enjoyed a decisive numerical advantage along their border with Germany. Eleven French divisions advanced along a 32 km (20 miles) line near Saarbrücken against weak German opposition. The attack did not result in the diversion of any German troops. The all-out assault was to have been carried out by roughly 40 divisions, including one armoured, three mechanised divisions, 78 artillery regiments and 40 tank battalions. The French Army had advanced to a depth of 8 km (5.0 miles) and captured about 20 villages evacuated by the German army, without any resistance. The half-hearted offensive was halted after France seized the Warndt Forest, 7.8 km2 (3.0 sq mi) of heavily mined German territory.
On 12 September, the Anglo-French Supreme War Council gathered for the first time at Abbeville. It was decided that all offensive actions were to be halted immediately as the French opted to fight a defensive war, forcing the Germans to come to them. General Maurice Gamelin ordered his troops to stop no closer than 1 km (0.62 miles) from the German positions along the Siegfried Line. Poland was not notified of this decision. Instead, Gamelin informed Marshal Edward Rydz-Śmigły that half of his divisions were in contact with the enemy and that French advances had forced the Wehrmacht to withdraw at least six divisions from Poland. The following day, the commander of the French Military Mission to Poland, General Louis Faury, informed the Polish Chief of Staff—General Wacław Stachiewicz—that the major offensive on the western front planned from 17–20 September had to be postponed. At the same time, French divisions were ordered to withdraw to their barracks along the Maginot Line, beginning the Phoney War.
A notable event during the Phoney War was the Winter War, which started with the Soviet Union's assault on Finland on 30 November 1939. Public opinion, particularly in France and Britain, found it easy to side with Finland, and demanded from their governments effective action in support of "the brave Finns" against their much larger aggressor, the Soviet Union, particularly since the Finns' defence seemed so much more successful than that of the Poles during the September Campaign. As a consequence of its attack, the Soviet Union was expelled from the League of Nations, and a proposed Franco-British expedition to northern Scandinavia was much debated. British forces that began to be assembled to send to Finland's aid were not dispatched before the Winter War ended, but were sent instead to Norway's aid in the Norwegian campaign. On 20 March, after the Winter War had ended, Édouard Daladier resigned as Prime Minister of France, partially due to his failure to aid Finland's defence.
The open discussions on an Allied expedition to northern Scandinavia, also without the consent of the neutral Scandinavian countries, and the Altmark Incident on 16 February, alarmed the Kriegsmarine and Germany by threatening iron ore supplies and gave strong arguments for Germany securing the Norwegian coast. Codenamed Operation Weserübung, the German invasion of Denmark and Norway commenced on 9 April. From the 14th, Allied troops were landed in Norway, but by the end of the month, southern parts of Norway were in German hands. The fighting continued in the north until the Allies evacuated in early June in response to the German invasion of France; the Norwegian forces in mainland Norway laid down their arms at midnight on 9 June.
The debacle of the Allied campaign in Norway, which was actually an offshoot of the never-realised plans to aid Finland, forced a famous debate in the House of Commons during which the British Prime Minister Neville Chamberlain was under constant attack. A nominal vote of confidence in his government was won by 281 to 200, but many of Chamberlain's supporters had voted against him while others had abstained. Chamberlain found it impossible to continue to lead a National Government or to form a new coalition government with himself as the leader. So on 10 May, Chamberlain resigned the premiership but retained the leadership of the Conservative Party. Winston Churchill, who had been a consistent opponent of Chamberlain's policy of appeasement, became Chamberlain's successor. Churchill formed a new coalition government that included members of the Conservatives, Labour and the Liberal Party, as well as several ministers from a non-political background.
Most other major actions during the Phoney War were at sea, including the Second Battle of the Atlantic fought throughout the Phoney War. Other notable events among these were:
British war planning had called for a "knockout blow" by strategic bombing of German industry with the RAF's substantial Bomber Command. However, there was considerable apprehension about German retaliation, and when President Franklin D. Roosevelt proposed an agreement not to mount any bombing raids which might endanger civilians, Britain and France immediately agreed and Germany two weeks later. The RAF therefore conducted a large number of combined reconnaissance and propaganda leaflet flights over Germany. These operations were jokingly termed "pamphlet raids" or "Confetti War" in the British press.
On 10 May 1940, eight months after Britain and France had declared war on Germany, German troops marched into Belgium, the Netherlands and Luxembourg, marking the end of the Phoney War and the beginning of the Battle of France.
Italy, hoping for territorial gains when France was defeated, entered the war on 10 June 1940, although the thirty-two Italian divisions which crossed the border with France enjoyed little success against five defending French divisions.
"There is something phoney about this war," [Senator William E. Borah (R. Idaho) in an interview] told questioners yesterday, explaining that he meant the comparative inactivity on the Western Front. "You would think," he continued, "that Britain and France would do what they are going to do now while Germany and Russia are still busy in the East, instead of waiting until they have cleaned up the eastern business." He did not expect an early end to hostilities.
Accordingly, the Allies first devised Plan E whereby they would advance into Belgium as far as the Scheldt River, but after months of inactivity that the British press termed "sitzkrieg," a bolder Plan D emerged that called for an advance as far as the Dyle River, a few miles east of Brussels.
The invasion of France brought France and Britain into the war. For more than six months, the two sides sat idle — the British press called it Sitzkrieg — as Germany sought to avoid war with Britain without ceding Poland. With war unavoidable, the Germans attacked France on May 10, 1940.
When, on September 1, 1939, Germany invaded Poland, which Britain had pledged to defend, Britain declared war. But it did nothing to help Poland; for eight months, the conflict remained strictly the "Phoney War." In May 1940, in what the British press had taken to calling the "sitzkrieg" became a German blitzkrieg throughout Western Europe, Hitler-colluder-with-Chamberlain was replaced by Hitler-antagonist-of-Winston Churchill.