It’s a date etched into the annals of history, a moment that irrevocably shifted the global landscape: September 3, 1939. This was the day Britain and France, bound by their commitment to Poland, declared war on Germany. The spark that ignited this global conflagration was, of course, Germany's invasion of Poland just two days prior, on September 1st. Adolf Hitler, driven by his expansionist ambitions, had already set his sights on Austria and Czechoslovakia, but Poland was the line in the sand.
Prime Minister Neville Chamberlain, in a somber broadcast to the nation at 11:15 AM, delivered the news that Britain was now at war. The ultimatum issued to Germany, demanding the withdrawal of troops from Poland, had expired without a satisfactory response. "I have to tell you now that no such undertaking has been received and consequently this country is at war with Germany," Chamberlain stated, his words carrying the weight of a nation on the brink.
Across the Channel, France echoed this sentiment. Their own ultimatum, presented in Berlin at 12:30 PM, set a deadline of 5:00 PM for German withdrawal. Failure to comply meant France, too, would be at war. The gravity of the situation was not lost on King George VI, who called upon his people, both at home and across the seas, to remain "calm, firm and united in this time of trial." He acknowledged the arduous path ahead, warning that "dark days" were inevitable and that "war can no longer be confined to the battlefield."
In response to the unfolding crisis, a War Cabinet of nine members was swiftly established. Notably, Winston Churchill returned to a prominent position as First Lord of the Admiralty, a role he had held during the First World War. Anthony Eden, who had previously resigned over the policy of appeasement, was appointed Dominions Secretary with special access to the War Cabinet, signaling a shift in government strategy.
The nation was already mobilizing. The National Service (Armed Forces) Act had been passed, making men between 18 and 41 liable for conscription. The armed forces were already at a heightened state of readiness, with Territorial Army conscripts having been called up the previous July.
News from Poland painted a grim picture. German forces had bombed numerous towns and cities, some with little strategic importance, resulting in widespread casualties. Chamberlain, in his broadcast, expressed his profound sadness that the "long struggle to win peace" had ultimately failed, lamenting that he could "not believe that there is anything more or anything different that I could have done and that would have been more successful."
This declaration of war was met with a mix of apprehension and resolve. While there had been anger in the House of Commons over perceived delays in taking action, the official announcement was received with "rousing cheers." Italy's proposed five-power conference was also rejected, as Britain could not participate while Poland was under invasion. The news was met with immense enthusiasm in Warsaw, where crowds poured into the streets outside the British and French embassies, cheering and singing, a testament to the solidarity felt in the besieged Polish capital.
