After the war, Prévost was posted to the West Indies, where he served as deputy inspector general at Kingston, Jamaica.

[1] By the summer of 1776, Prévost was in charge of a contingent of the 60th stationed in St. Augustine, the capital of British East Florida.

Prévost arrived at Savannah, Georgia on 17 January 1779 which was protected by British Lieutenant Colonel Archibald Campbell.

Prévost assumed command but also sent the message to General Clinton that he wished to resign, believing that a younger man should take his place.

In May 1779, his troops launched an unsuccessful raid against Charles Town, South Carolina, and looted the countryside during their retreat.