Despite the United States desire to move to push button warfare, the demise of the tank had not yet happened and so they were forced to develop new tanks to take on the Soviet Union in the Cold War.
The M-47 tank was not used in combat by the US Army and only served in US service for a few years. Later upgraded with new engines and later new guns and fire control they served with many allied nations.
Perhaps the most lasting use of the M-47 was as German Tiger II tanks in the movie The Battle of the Bulge. I may make up a few for that use in my own collection. At least 15 were used in the movie in the days before CGI tanks had to be used where they could be found.
This is my second M-47 battalion, when you have as many Roco T-54 as I have, you need a lot of these old soldiers to keep up. I have no actual evidence that the US Army painted any of these tanks in a brown camo, but here in California it has been a common scheme in the National Guard for M-48 and M-60 series tanks so I took the liberty and got a company in that color.