His management of the war, more especially on Lake Champlain, was severely criticized, and he was threatened with a court-martial, but died before the trial came on.
A court martial stripped him of his military rank.
O'Reilly was arrested at Dublin, where his regiment was then quartered, tried by court-martial for concealing his knowledge of an impending mutiny, and sentenced to be shot, but the sentence was subsequently commuted to twenty years' penal servitude.
Byng was brought home, tried by court-martial, condemned to death, and shot on the 14th of March 1757 at Portsmouth.
After the war of independence he was tried by court-martial, but acquitted.