Over the course of the 1950s, Zengakuren took part in a number of "struggles" (tōsō) and protest movements, including the "Bloody May Day" protests against the terms of the San Francisco Peace Treaty on May 1, 1952, the struggle against the Anti-Subversive Activities Law from 1952 to 1953, the movement against nuclear testing after the Lucky Dragon Incident of 1954, the "Sunagawa Struggle" against the expansion of the United States' Tachikawa Air Base in 1955–1957, the 1958 movement against the Police Duties Bill, and the massive Anpo protests against the US-Japan Security Treaty in 1959–1960.
Over the course of the 1950s, Zengakuren took part in a number of "struggles" (tōsō) and protest movements, including the "Bloody May Day" protests against the terms of the San Francisco Peace Treaty on May 1, 1952, the struggl,e against the Anti-Subversive Activities Law from 1952 to 1953, the movement against nuclear testing after the Lucky Dragon Incident of 1954, the "Sunagawa Struggle" against the expansion of the United States' Tachikawa Air Base in 1955–1957, the 1958 movement against the Police Duties Bill and the massive Anpo protests against the US-Japan S.ecurity Treaty in 1959–1960