The U.S. Army worked on several similar projects in the 1950s and '60s, under the general name of "Atomic Demolition Munitions": https://en.wikipedia.org/wiki/A

The U.S. Army worked on several similar projects in the 1950s and '60s, under the general name of "Atomic Demolition Munitions": https://en.wikipedia.org/wiki/Atomic_demolition_munition#United_States_ADMs https://en.wikipedia.org/wiki/Atomic_demolition_munition#Uni... The weirdest of these was probably the Special Atomic Demolition Munition (SADM; see (https://en.wikipedia.org/wiki/Special_Atomic_Demolition_Munition) https://en.wikipedia.org/wiki/Special_Atomic_Demolition_Muni...), also known as the "backpack bomb" because its relatively light weight (around 50 pounds) made it possible for a single soldier to wear it like a backpack. The Soviet Union is rumored to have developed even smaller nuclear weapons, the so-called "suitcase nukes" (see https://en.wikipedia.org/wiki/Suitcase_nuclear_device https://en.wikipedia.org/wiki/Suitcase_nuclear_device), though the existence of those has never been conclusively proven.