The United States will conduct an anti-mining naval exercise in the Middle East in September, the Pentagon said.
The action comes amid concern about Iran blocking key oil transport routes with underwater mines.
The exercise, scheduled for September 16-27, will involve more than 20 countries and take place in multiple locations, Pentagon spokesman George Little said.
"This is a defensive exercise aimed at preserving freedom of navigation in the international waterways of the Middle East and aimed at promoting regional stability," Little told reporters at a Pentagon press conference. "These exercises are designed to enhance cooperation (and) develop mutual maritime capabilities, and are aimed at promoting long-term regional stability."
Little said the military event is not meant to deliver a message to Iran.
"This is an exercise that's designed to, within this multinational forum, increase our capabilities and cooperation."