In which conflict were the Underwater Demolition Teams (UDT's) reactivated?

The Underwater Demolition Teams (UDTs) were reactivated during the Korean War, which was crucial for conducting missions that included demolition of enemy obstacles, reconnaissance, and beach landing preparations. The context of the war necessitated their skills, particularly given the strategic importance of coastal operations in the Korean theater.

Although UDTs continued to play significant roles in subsequent conflicts, including the Vietnam War where they were heavily utilized for similar purposes, their reactivation specifically took place in response to needs identified during the Korean War. The other conflicts listed either did not involve the reactivation of UDTs or occurred after the original establishment of the teams in World War II.