Italian defeats prompted Germany to deploy an expeditionary force to North Africa. Operation Sonnenblaume (6 February - 25 May) was the name given to the dispatch of German troops to North Africa in February 1941, The Italian 10th Army had been destroyed by the British and Allied Western Desert Force attacks during Operation Compass (9 December 1940 – 9 February 1941). Sonnenblume succeeded because the ability of the Germans to mount an offensive was underestimated by General Archbald Wavell, the Commander in Chief Middle East, the War Office and by Winston Churchill.
On 16 February 1940, Churchill personally ordered Captain Philip Vian of the destroyer HMS Cossack to board the German supply ship Altmark in Norwegian waters and liberate some 300 British prisoners who had been captured by the Admiral Graf Spee. These actions, supplemented by his speeches, considerably enhanced Churchill's reputation.