The conservative and cautious nature of Irish foreign policy today has its roots in the 1960s. The Fianna Fáil governments of Seán Lemass and Jack Lynch removed whatever idealistic and radical elements Irish foreign policy had had in the late 1950s in favour of European integration and a pro-American foreign policy. This change was most evident in Irish policy towards the Vietnam War. Using archival material, recently released by the Irish government, and press reports, this paper assesses Irish policy and attitudes towards that conflict. It concludes that Ireland's policy was much more like that of loyalist NATO members, such as West Germany and the UK, than like that of neutral countries, such as Sweden.