In 1777 the Fusiliers were in Philadelphia during an inglorious time for British Arms. It is recorded that 'gaming was permitted to a ruinous extent, the miscounduct of officeres offended the Philadelphians and made rebels of people orginally loyal.'

In December 1779 the Fusiliers set sail for South Carolina to attack Charleston. The attack succeeded and in May 1780 the town surrendered with the loss of 10 American regiments, 3 battalions of artillery and the local militia. The Fusiliers lost one killed and one wounded.