Heh! Not quite. The Davey Crockett was a recoilless rifle you could mount on a jeep with a range of about 1-1/2 to 2-1/2 mi. Atomic Annie
was a little bit larger with a range of about 20 mi.
There was a great range of weapons produced: Nuclear Artillery
And there was a whole slew of strange ideas. How would you like to be the soldier issued this? Backpack Nuke
And my personal favorites: a nuclear-powered cruise missile and a spaceship powered by nuclear bombs
Sorry to tread-jack. "Now back to our regular program ..."