Davy Crockett Weapon System

The device
The M-28 or M-29 Davy Crockett Weapons System was a tactical recoilless gun launcher systems was small 10 or 20 tonne yield nuke that was

Service in S. Korea and Germany
Thankfully the gun's mushroom clouds did not push up over the Korean Peninsular or Germany.

Links

 * 1) http://galnet.wikia.com/wiki/Davy_Crockett_Weapon_System
 * 2) http://www.3ad.com/history/cold.war/nuclear.pages/weapons.pages/davy.crockett.htm
 * 3) http://www.guntruck.com/DavyCrockett.html
 * 4) http://en.wikipedia.org/wiki/Davy_Crockett_(nuclear_device)