The Organization of Eastern Caribbean States (OECS), Barbados, and Jamaica all appealed to the United States for assistance. On 25 October 1983, combined forces from the United States and from the Regional Security System (RSS) based in Barbados invaded Grenada in an operation codenamed ''Operation Urgent Fury''. The US stated this was done at the behest of Barbados, Dominica and Governor-General Sir Paul Scoon. Scoon had requested the invasion through secret diplomatic channels, but it was not made public for his safety. Progress was rapid, and within four days the Americans had removed the military government of Hudson Austin.