<Li> 5.6 million rounds of ammunition </Li> <Tr> <Td_colspan="2"> Civilian casualties: 24 killed </Td> </Tr> <P> The United States invasion of Grenada was a 1983 invasion led by the United States of the Caribbean island nation of Grenada, which has a population of about 91,000 and is located 160 kilometres (99 mi) north of Venezuela, that resulted in a U.S. victory within a matter of weeks . Codenamed Operation Urgent Fury, it was triggered by the internal strife within the People's Revolutionary Government that resulted in the house arrest and the execution of the previous leader and second Prime Minister of Grenada Maurice Bishop, and the establishment of a preliminary government, the Revolutionary Military Council with Hudson Austin as Chairman . The invasion resulted in the appointment of an interim government, followed by democratic elections in 1984 . The country has remained a democratic nation since then . </P> <P> Grenada gained independence from the United Kingdom in 1974 . The leftist New Jewel Movement seized power in a coup in 1979 under Maurice Bishop, suspending the constitution and detaining a number of political prisoners . In 1983, an internal power struggle began over Bishop's relatively moderate foreign policy approach, and on 19 October, hard - line military junta elements captured and executed Bishop, his partner Jacqueline Creft, along with three cabinet ministers and two union leaders . Subsequently, following appeals by the Organisation of Eastern Caribbean States and the Governor - General of Grenada, Paul Scoon, the Reagan Administration in the U.S. quickly decided to launch a military intervention . From the U.S. perspective, a justification for the intervention was in part explained as "concerns over the 600 U.S. medical students on the island" and fears of a repeat of the Iran hostage crisis . </P>

What was the code name of the us invasion of grenada in 1983