"in late February 1944" . "US Fifteenth Air Force" . . "spring of 1944" . "Germany" . "final American large strategic daytime raid" . . "Over 2,000 aircrew killed or captured" . "Big Week" . "on 20 February" . . "RAF Bomber Command" . . . "28 fighters" . "US Eighth Air Force" . "USAAF:" . "Allied victory" . "Operation Argument (Big Week)" . . . . "RAF:" . . . "1944-02-25" . . "Big Week" . . "United Kingdom" . "Big Week, 20\u201325 February 1944" . "131 bombers" . . . . . . . . "226 heavy bombers" . "RAF Fighter Command" . . . "on the same night as the Luftwaffe's Westminster-area raid" . . "Luftwaffe" . .