 From 18 to 25 March, the 17th Division was able to fight its way back through four Japanese road blocks, thanks to air re-supply by the RAF and U.S Troop Carrier Command crews in their Douglas C-47 Skytrains, and assistance from Scoones's reserve, the 23rd Indian Division.The two divisions reached the Imphal plain on 4 April.Meanwhile, Imphal had been left vulnerable to the Japanese 15th Division.