Naval War Games at the Strait of Hormuz

One British paper reports (amid some breathless speculation about Israel and Iran -  just the facts about the fleet, please) that this round of the annual exercises are the biggest war games ever for that region as vessels from 25 nations head for the Persian Gulf:

The multi-national naval force in the Gulf includes three US Nimitz class carrier groups ... supported by at least 12 battleships, including ballistic missile cruisers, frigates, destroyers and assault ships carrying thousands of US Marines and special forces. 

The British component consists of four British minesweepers and the Royal Fleet Auxiliary Cardigan Bay, a logistics vessel. HMS Diamond, a brand-new £1billion Type 45 destroyer, one of the most powerful ships in the British fleet, will also be operating in the region.