Lieut. Casper was killed by enemy gunfire during operations across the bridgehead between Stolzenau and Leese.
His death is described by Capt. John Day 45RM Cdo. in his book A Plain Russet-Coated Captain, "At one of our brief pauses as we moved along the river bank I found myself crouching beside a young subaltern, Peter Casper, whose men were endeavouring to provide us with some covering fire. During a lull in the firing we heard shouting from the German positions. Peter said "They want to surrender", leapt to his feet, took off his beret, and waved it at the enemy. Two or three bullets cracked at us and Peter Casper fell dead at my feet."