The Pentagon is moving a Marine expeditionary unit to the Middle East, as Iran steps up its attacks on the Strait of Hormuz, according to two U.S. officials. Defense Secretary Pete Hegseth has approved a request from U.S. Central Command, responsible for American forces in the Middle East, for the expeditionary unit, typically consisting of up to 2,500 Marines, the officials said.

The move comes as Iran’s attacks on the strait have paralyzed traffic through the strategic waterway, disrupting the global economy, driving up gas prices and posing a major military and political challenge for President Trump. A Pentagon spokesperson declined to comment.