A-BATTERY WAS AT RACH KIEN, B-BATTERY WAS AT BINH PHUOC, C-BATTERY WAS AT TAN TRU AND D-BATTERY WAS AT TAN AN, D-BATTERY WAS THE FIRST AIRMOBILE FIRING PLATFORM UNIT IN VIETNAM, OCTOBER 1967, IT WAS MADED UP BY TAKING ONE GUN FROM A-BATTERY, ONE GUN FROM B-BATTERY AND ONE GUN FROM C-BATTERY-2ND/4TH-ARTILLERY, THIS UNIT BECAME DELTA-BATTERY-2ND/4TH-ARTILLERY-9TH-INFANTRY-DIVISION