Question: Operation Wigwam was conducted between two series of nuclear test explosions, one of which was aimed to establish military tactics for ground forces on a nuclear battlefield and was preceded by which operation?
Sentence (from "Operation Wigwam"): The purpose of "Wigwam" was to determine the vulnerability of submarines to deeply detonated nuclear weapons, and to evaluate the feasibility of using such weapons in a combat situation.
Relevant evidence: No