Forty-five months of war had stretched Britain as far as she would stretch. More than 12 percent of the British population now served in the armed forces; with national mobilization nearly complete, severe manpower shortages loomed if the war dragged on, particularly if it required storming the glacis of Festung Europa across the Channel. British battle deaths already exceeded 100,000, with thousands more missing, 20,000 merchant mariners lost, and another 45,000 dead in the United Kingdom from German air raids.
