In the Kingdom of Holland, the British launched the Walcheren Campaign to open up a second front in the war and to relieve the pressure on <answer>the Austrians</answer>. The British army only landed at Walcheren on 30 July, by which point <answer>the Austrians</answer> had already been defeated. The Walcheren Campaign was characterized by little fighting but heavy casualties thanks to the popularly dubbed "Walcheren Fever." Over 4000 British troops were lost in a bungled campaign, and the rest withdrew in December 1809. The main strategic result from the campaign became the delayed political settlement between the French and <answer>the Austrians</answer>. Emperor Francis wanted to wait and see how the British performed in their theater before entering into negotiations with Napoleon. Once it became apparent that the British were going nowhere, <answer>the Austrians</answer> agreed to peace talks.
The Walcheren Campaign was intended to relieve the military pressure on whom?
the Austrians