How did Oliver Cromwell discover Jamaica?

Oliver Cromwell did not discover Jamaica; rather, he oversaw its capture during the English Civil War. In 1655, under his command, an English fleet led by Admiral William Penn and General Robert Venables invaded Jamaica, which was then a Spanish colony. The invasion was part of Cromwell's broader strategy to expand English territorial claims in the Caribbean. Following the successful capture, Jamaica became an English colony and remained under British control for centuries.