"The Armies of the Night" is a non-fiction novel by Norman Mailer, published in 1968. It blends history and literature, recounting the events surrounding the 1967 anti-Vietnam War march on the Pentagon. The book is notable for its unique narrative style, combining elements of journalism and fiction, as Mailer reflects on his experiences and the broader cultural context of the time. The work is divided into two parts: the first focuses on the march itself, while the second delves into Mailer's personal reflections and interactions with other participants. It explores themes of protest, identity, and the role of the artist in society, making it a significant contribution to the literature of the 1960s.