'Regatta' (i) was the British movement of Brigadier C. J. Weld’s Indian 21^st Brigade of Major General W. A. K. Fraser’s (from 15 May Major General W. J. Slim’s) Indian 10^th Division by boat up the Shatt al-Arab waterway and Tigris river during the 'Sabine' suppression of the Iraqi revolt (early May 1941).