Evis,
You may be right about the Vulcan, don't know.
I think there was an M60, not M60A1, that came out in the 60's. I guess I'll check
Got my curiousity goin....
Ok here's a pic of the M60
http://afvdb.50megs.com/usa/pics/m60.jpgAnd some Info:
The turret and armament on this vehicle appears similar to that of the M48A5 tank, but the hull is noticeably different. The front hull is wedge-shaped and straight as opposed to M48's rounded, cast hull. The road wheels on the M60 are forged aluminum, and there are reinforcing struts running around the circumference of each wheel. M60 inherited the very large cupola of the Patton series, and the 12.7mm M85 machine gun could be aimed, fired, and reloaded from under armor.
Now I gotta find some dates.. Best that I can tell, the original M60, with a Turret like the M48, was deployed 1st in 1961. No doubt they all went to Europe, to face the Evil Russian Hordes
Here's a link about the M60A1
http://www.soft.net.uk/entrinet/armour9.htmFound some 11th Armored Cavalry Sites with some Historical Info.
The 11th ACR (Blackhorse) was in Vietnam until 1972, and they only had M48's.
http://blackhorse.dartmouth.edu/dcompany/There was some debate about armor even being deployed to Vietnam it seems. I would imagine all the M60's went to 7th Army (Germany)
It would seem that the M48 is the Tank for US and ARVN forces to Model for Vietnam.