The phrase "Britain stood alone" refers to the period during World War II when the United Kingdom was the only major European power still actively fighting Nazi Germany after the fall of France in June 1940. This sentiment, often expressed by British people, captures the sense of isolation and the immense pressure Britain faced during those early years of the war.
After the German invasion of France in May 1940, the British Expeditionary Force was evacuated from Dunkirk, and France officially surrendered on June 22, 1940. At that point, Nazi Germany had control over much of Western Europe, and Britain was left to face the threat of invasion alone. In the following months, Britain braced for Operation Sea Lion, the planned German invasion of Britain, which was postponed after the Luftwaffe failed to achieve air superiority during the Battle of Britain.
For nearly a year after France's surrender, Britain was effectively fighting the war in isolation, facing constant bombing raids (the Blitz) and the prospect of a German invasion. Despite this, Britain continued to resist, bolstered by the leadership of Winston Churchill, who became Prime Minister in May 1940. His defiant speeches, including the famous "We shall fight on the beaches" address, solidified the idea that Britain would not surrender.
The situation changed dramatically in June 1941, when Hitler launched Operation Barbarossa, the invasion of the Soviet Union. This marked a significant shift in the war, as Germany opened up a new front in the East, dividing its military efforts. Britain, however, still bore the brunt of the fight in Western Europe until the United States entered the war in December 1941 after the attack on Pearl Harbor.
The idea that Britain "stood alone" for two years is a simplification of the broader situation, as Britain did receive some support from the British Commonwealth, including Canada, Australia, and New Zealand. Additionally, British efforts to support the Soviet Union and the eventual involvement of the United States were critical. However, the phrase encapsulates the fierce sense of national resilience during the darkest days of the war, particularly before the full mobilization of the Allies.