In 1755 Gage's regiment was sent to North America as part of General Edward Braddock's expeditionary force, whose objective was the expulsion of French forces from the Ohio Country, territory disputed between French and British colonies where there had been military clashes in 1754. On this expedition Gage's regiment was in the vanguard of the troops when they came upon a company of French and Indians who were trying to set up an ambush. This skirmish began the Battle of the Monongahela, in which Braddock was mortally wounded, and George Washington distinguished himself for his courage under fire and his leadership in organising the retreat. The commander of the 44th, Colonel Sir Peter Halkett, was one of many officers killed in the battle and Gage, who temporarily took command of the regiment, was slightly wounded. The regiment was decimated, and Captain Robert Orme (General Braddock's aide-de-camp) levelled charges that poor field tactics on the part of Gage had led to the defeat; as a result of his accusations Gage was denied permanent command of the 44th Regiment. Gage and Washington maintained a somewhat friendly relationship for several years after the expedition, but distance and lack of frequent contact likely cooled the relationship. By 1770, Washington was publicly condemning Gage's actions in asserting British authority in Massachusetts.