On 18 April 1988, the U.S. Navy had a one-day battle against Iranian forces in and around the strait. The battle, called Operation Praying Mantis by the U.S. side, was started in retaliation for the 14 April mining of the USS "Samuel B. Roberts" (FFG-58) by Iran. U.S. forces sank one frigate, one gunboat, and as many as six armed speedboats in the engagement and seriously damaged a second frigate.