A Beginner's Guide to Navy-Strength RumAdam Clark Estes3/27/15 4:20pm11529EditPromoteGo to permalink The Royal Navy's successful invasion of Jamaica in 1655 had a lot of terribly negative outcomes. The commanders ended up in the Tower of London. Many of the English sailors fell sick or starved. A lot of Spanish settlers died. But there was one undeniably positive outcome: rum.