Having arrived back in India to take command of Fort St. David, south of Madras, in June 1756, on 16 October 1756 Clive led a British army force from in Madras to retake Calcutta from Siraj-ud-Daula. He recaptured Calcutta on 2 January 1757 and forced Siraj-ud-Daula to pay compensation and permit British fortification of the city.
Editors. "British recapture Calcutta from Mogul forces". The Literary Encyclopedia. First published 01 February 2010
[http://www.litencyc.com/php/stopics.php?rec=true&UID=4183, accessed 10 December 2013.]