Whirlwind,
The 334th took our barracks at Phu Loi around April of 70 when our unit left. The 1st Infantry (Bid Red One) "went home" on April 1, 1970 which was a joke. Our unit was re-designated Troop C , 16th Cav and sent to Soc Trang, then to Can Tho. We kept the same people, aircraft, call signs, and even the ARP's. I think that the only ones that went home were the CG and the CSGM.
Helped in some of the preliminary design of the XV-15 before going into the Army in 1968, but did not fly it.
The Delta was so flat that your just set your altimeter to zero and you were rarely more than 20 feet wrong. The bad guys couldn't dig deep to cover themselves as in tunnels in III Corp, like in the Iron Triangle or Cu Chi. They had spider holes and shallow bunkers, otherwise hid among the vegetation, villages, etc. They had no problem just stepping out into the open and open up on you. They also seemed to have a lot more .51 cal anti aircraft guns, as many as eight at a time. We killed a lot more of them in the delta and lost more aircraft. We also made the incursion into Cambodia.