High Quality Content by WIKIPEDIA articles! Operation Prime Chance (August 1987 – June 1989) was a United States Special Operations Command operation intended to protect U.S.-flagged oil tankers from Iranian attack during the Iran–Iraq War. The operation took place roughly at the same time as Operation Earnest Will (July 1987 – December 1988), the largely Navy effort to escort the tankers through the Persian Gulf. The operation was begun after the mining of the U.S.-flagged Kuwaiti oil tanker Bridgeton.