The eight chess Olympiad was held in Buenos Aires in August/September 1939. It was seriously affected by the outbreak of World war 2 but play continued and the event was completed. Many of the players stayed on in Argentina for the duration of the war and longer. The Olympiad was won by Germany ahead of Poland, though the two teams did not meet. In all 928 games were played and all of them are presented here, together with articles on the play published in the British chess press at the time. This is the earliest Olympiad for which all of the games are available. Many of the major figures of the chess world competed and this was Capablanca's last first class event. Capablanca had the best result on the 1st board with 8.5 of 11, ahead of Alekhine 7.5 of 10, and Petrov 9.5 of 13. Detailed indexes of players and openings, crosstables. The games are not annotated. Series Rare and Unpublished Tournaments and Matches 42.