The Pentagon is reportedly sending three California-based warships and roughly 2,500 Marines to the Middle East, the second significant deployment in a week.

The three warships are part of the San Diego-based USS Boxer amphibious ready group. The Marines are from the 11th Marine Expeditionary Unit, based at Camp Pendleton. The deployments were reported Friday by the Associated Press, citing Pentagon sources.

A 2,500-strong Marine unit accompanied by the USS Tripoli warship launched from Japan on Saturday.

The major reinforcement comes as the war’s economic shock waves are felt throughout the globe, as Washington seeks to secure vital shipping lanes and deter further attacks on energy infrastructure around the Persian Gulf.