It's the standard US Army NATO camouflage that's been in use since the 1980s. Most of our equipment was in this pattern as we left the MERDC scheme of the late 70s and early 80s.
After Desert Storm in 1991, our focus left a war in Europe and towards war in the Middle East. So we painted many of our vehicles in desert sand.
But there were still units in the US that kept their equipment in NATO 3-color.
Just about every Tamiya model kit from the 80s to today will have a standard US NATO 3-color camouflage paint scheme for a vehicle in use from about 1987-2020.