In Dec. '61, Gregg was appointed a B-G on Dec. 14, '61, and ordered to SC.
Believe the only regiment in his SC brigade that saw any action there in late Dec. '61 or very early Jan., '62, was the 14th SC. On the 1 Jan., '62, it was the only regiment of Gregg's brigade in SC that came under fire from Federal gunboats, near Pocotaligo, SC. This regiment successfully repelled any attempted Federal landing under the cover of gunboats. One fired gunboat shell reportedly exploded in the ranks of the 14th SC, killing 9 and wounding 15.
https://archive.org/details/historyofbrigade00cald/page/10/mode/1up?view=theater see pp. 10-11