Harold planned to visit Colombia last month, but at last he decided not to go because there was a small (1) against the government in the capital.
revolt作名词时可译为“反叛、叛乱”。本句意思为：哈罗德上月计划去哥伦比亚，但最后他决定不去了，因为首都发生了反政府的叛乱。