The unit was reorganized a final time in February 1947 to prepare for the formation of GAP 3 and the detachment of elements to the intensifying Indochina War. The 1st RCP formed the infantry of GAP 1, although two of its battalions had already been deployed to Indochina, the 42nd Demi-Brigade formed that of GAP 2, and GAP 3 was formed later that year from the 18th BIP, the 3rd Battalion of the 2nd RCP, and the 5th BPIC, which were part of its subordinate 43rd Demi-Brigade.