Churchill already had grave concerns about the fighting quality of British troops after the defeats in Norway, France, Greece and Crete. Following the fall of Singapore to the Japanese on 15 February 1942, he felt that his misgivings were confirmed and said: "(this is) the worst disaster and largest capitulation in British military history". More bad news had come on 11 February as the Kriegsmarine pulled off its audacious "Channel Dash", a massive blow to British naval prestige. The combined effect of these events was to sink Churchill's morale to its lowest point of the whole war.