On 23 December 1777, the 4th Georgia was assigned to the Georgia Brigade. In 1778, the regiment participated in the unsuccessful Florida Campaign and in the loss of Savannah. In 1779 the unit fought at the Siege of Savannah. At the Siege of Charleston the regiment was captured by the British army along with the rest of the American southern army at Charleston, South Carolina on 12 May 1780. The 4th Georgia was officially disbanded on 1 January 1781.