BTW,as a former US Army career NCO,I can tell you that system worked great because the army NEVER had any problems getting tactical air support from the USAF,the USN,or the USMC.
BTW,I just remembered one exception. The USMC at Da Nang was responsible for coming to the assistance of Special Forces "A-Camps" in I Corps. When Ben Het was hit and in danger of being overan,they radioed Da Nang to request assistance because they were in danger of being over ran,and the NVA had tanks.
The USMC commanding General in charge at Da Nang refused to send any support to the camp because he didn't like Special Forces because they were independent from his command and he was obligated to support them,instead of THEM supporting him.
So he just went to bed and let Ben Het get overran. The only assistance they got was some Recon guys from CCN talked a VN helicopter pilot into flying them into Ben Het so they could try to rescue any survivors. Which they did,all on their own with no orders and no offical approval. They just got on the helicopter and took off.
The USMC General,according to what i heard,was surprised to see General William Westmoreland,the commanding General of all US Forces in VN in this office that morning.
Westmoreland had taken off shortly before dawn to get to Da Nang early to try and arrange to have any survivors rescued. He releived that USMC General on the spot,and named his Number 2 to be the CMMFIC in I Corps,and ordered the new commander to send a relief column. Which the new general in charge did instantly.
PLEASE take note that it was NOT the USMC that refused to help the A camp. It was one butthole USMC General who thought he was so important the rules didn't apply to him.
BTW,the camp may have been at Lang Vei instead of Ben Het. My memory ain't what it used to be,and I am too tired to look it up. Besides,the location is mostly irrelevant.