Clark was one of my Professors at "Hudson High" when he was an LTC ..... I was stunned (and disappointed) when I saw him at Waco. I'm pretty sure he was the CG of the 1st Cav at the time. Now that I am thinking about it more .... I think I am wrong about the Delta CO .... Clark's ADC was in Delta and he was involved in support operations at Waco and I think he is now the CSA.
You are correct, Clark was CO of First Cav. and General Peter Schoomaker was the XO. I had it backwards.