On 1 January, in an attempt to keep the offensive going, the Germans launched two new operations. At 09:15, the "Luftwaffe" launched "Unternehmen Bodenplatte" (Operation Baseplate), a major campaign against Allied airfields in the Low Countries. Hundreds of planes attacked Allied airfields, destroying or severely damaging some 465 aircraft. However, the "Luftwaffe" lost 277 planes, 62 to Allied fighters and 172 mostly because of an unexpectedly high number of Allied flak guns, set up to protect against German V-1 flying bomb attacks and using proximity fused shells, but also by friendly fire from the German flak guns that were uninformed of the pending large-scale German air operation. The Germans suffered heavy losses at an airfield named Y-29, losing 24 of their own planes while downing only one American plane. While the Allies recovered from their losses in just days, the operation left the "Luftwaffe" weak and ineffective for the remainder of the war.