In Italy… At Anzio the Allied offensive begins. There are heavy losses and no gains against the German defenses. To the south, along the German-held Gustav Line, the US 5th Army continues attacking. The British 5th Division (part of 10th Corps) breaks through the line and captures Monte Natale. Around Monte Cassino, the US 34th Division (part of 2nd Corps) holds its bridgehead on the west bank of the Rapido River.

In Ceylon… The British battleships Queen Elizabeth and Valiant, and the battle cruisers Renown with the aircraft carriers Illustrious and Unicorn arrive in Colombo. An additional battleship and carrier are already on station here, along with an increasing number of submarines.

In the Marshall Islands… US Task Force 58 continues the bombardment of Kwajalein, Roi, Namur and Eniwetok. There are 7 battleships involved and 400 bombing sorties are flown.