He spent much of his time writing articles in military journals on Soviet strategic operations and most notably, co-authored the six-volume work on Soviet involvement during World War II, "The Soviet Union's Great Patriotic War (1941–1945)". In August 1967, Bagramyan accompanied General Secretary Leonid Brezhnev and Premier Alexei Kosygin to North Vietnam, where they met with Vietnamese leaders as he, serving in the role of a military expert, helped negotiate the transfer of logistics and arms to the country during the Vietnam War.