During Rambo II, Trautman doesn't work with SOG, but with the Delta Force. Why?
The MacVsog was disbanded in the middle of fierce controversies when the war was still going on (1972). Newspapers discovered that some U.S. special forces used to fight violating the international laws of war, and since the war was already unpopular in the United States, the military decided to disband the SOG.
Between the accusations against US Special Forces, there was the fighting the Vietcong on the soil of neutral countries, to act using irregular battle dress uniforms and to commit homicide between the civilians. In fact, the SOG really used to do all of these things because they were perfectly normal in the context of a civil war, where your enemies have no uniforms and follow no rule at all.
For ten years the US denied that the SOG had ever existed, but the US laws say that after a certain number of years, any secret has to be declassified.
So in the eighties everything concerning SOG became public and SOG found its way into the history books.
And that's the way we discovered that the Delta Force was born from the SOG's ashes.
The Delta Force is a military unit specialized in anti-terrorism warfare and info gathering on enemy soil. Delta Force soldiers are as much soldiers as they are spies.
Most of the military personnel that created the Delta Force had a past with the SOG. Fighting strategies and methods, at least in the beginning, mostly came from the Vietnam War experience.
But the Delta Force connection doesn't stop here.