The Army has one airborne division, the 82nd. They used to have a battalion of light tanks that accompanied them into battle. Used to.
I'm a Coastie, so my expertise in Army matters is roughly nil. However, my father was in the 82nd and told me all about it when I was a kid, and I've always loved reading military history ... concerning all branches, not just my own. So I may not know much, but I do know the 82nd Airborne needs some light armor ... and an M1 Abrams is too darn big and heavy for their purposes.
Enter the M8 Buford.






What about the 101st at Ft Campbell, KY?