On July 11, 1943, during his service leading troops in Operation Husky, the Allied invasion of Sicily, Craig set out to destroy an Italian Army machine gun nest that had halted the advance of his company, making his attempt following the wounding of three other officers who had tried to locate and silence that machine gun emplacement. Craig located the enemy position and snaked his way to a point within 35 yards of the gun before being discovered. Charging into the answering fire, Craig reached the machine gun and killed its three crewmen.