I've always had a thing for the late 60s/early 70s US forces in Europe. They were at the low point of relative tech and morale, thanks to Vietnam, while the Soviets were really pumping out some cutting edge platforms and had yet to experience the dolorous effects of Afghanistan. If ever there was a point in the Cold War where the US neared underdog status, then it was here (although anyone looking at the comparative GDPs of the US and the USSR will quickly see this was a fairly monocausal conclusion)
There is a certain aesthetically charm from the equipment of this era; big, clunky and looking vulnerable as hell. The M113s resemble Duplo blocks, better suited for a child's playset than a nuclear battlefield. Similarly, the M48s look like morbidly obese cousins to their fair slimmer and more effective Soviet counterparts, bloated in every respect except where it counts. Out of all of them, the M60 only really looks the sensible part, but even then, its performance was only average.
Main color was achieved through the AK interactive US armor WW2 modulation set using a combination of Iwata and Badger airbrushes. Weathering was then achieved through a combination of MIG and AK interactive oil washes and streak pre mixes.