His men, who often referred to themselves as "Sykes' Regulars", distinguished themselves defending their position at Gaines' Mill during the Seven Days Battles, before the Union line broke elsewhere.
Hans mænd, som ofte omtalte sig selv om "Sykes's Regulars," udmærkede sig ved at forsvare deres stilling i Slaget ved Gaines' Mill under Syv dages slaget, indtil Unionens linje brød sammen et andet sted.