MGR-1A Honest John rocket

The MGR-1 Honest John rocket was the first nuclear-capable surface-to-surface rocket in the US arsenal. Designated Artillery Rocket XM31, the first such rocket was tested 29 June 1951 and the first production rounds were delivered in January 1953. The designator was changed to M31 in September 1953. The first Army units received their rockets by year's end and Honest John battalions were deployed in Europe in the Spring of 1954. Alternatively, the rocket was designed to be capable of carrying an ordinary high-explosive warhead weighing 1500 pounds, even though that was not the primary purpose for which it was originally envisioned.

http://en.wikipedia.org/wiki/MGR-1_Honest_John