Last spring--after notable victories at Stalingrad and in Tunisia and against the U-boats on the high seas--overconfidence became so pronounced that war production fell off.
The downfall of the Dunajec-Biala front had been attributed by the Russian War Staff to overconfidence or neglect on the part of General Dmitrieff, who was subsequently relieved of his command and replaced by General Lesch.
Harvard overconfidence was a byword when he was in college, and it was overconfidence which he feared now.