On 4 Dec 1777, America, Philadelphia. The 49th Light Company and possibly other battalion companies successfully engaged in an attack by Washington's troops, at Chestnut Hill and Whitemarsh, who they helped to drive back
On 18 June 1778, America, Philadelphia. It was decided the British troops would evacuate Philadelphia and fall back on New York. This included the 49th except for the grenadier Company which remained with the rearguard under Clinton. On this date the troops reached Allentown unmolested
On 13 Dec 1778, West Indies, St Lucia. As part of a British force the 49th was sent to seize St. Lucia. Holding the island in a bloody battle against the French, the 49th earned the battle Honour of St. Lucia, although this was not officially sanctioned until 1900
During 1779, Ireland, Cork. Nine Companies deployed here during the year. In may one company was deployed to Wexford, the Light Company with their Brigade, two companies to Dungarven, five companies to Waterford and one company remained in Kinsale.
On 25 June 1780, West Indies, St Lucia. Letter sent to Secretary of State saying 'C-in-C (Vaughan) had ordered the 49th to be drafted, as through losses and illness it had become ineffective'. A few of its remaining soldiers were drafted to other regiments