Thousands of Marines storm U.S. beaches as Operation Bold Alligator simulates international invasion 
[Iran invading Saudi Arabia?]

20,000 troops from eight countries take part in massive amphibious landing exercise in North Carolina and Virginia.

DEBKAfile, "Bold Alligator 2012" drills 20,000 troops on US East Coast for Persian Gulf action
The exercise is scheduled to end on February 14, a week before the winding up of the Iranian drill, after which the participants are to be shipped out to Persian Gulf positions opposite Iran. Altogether three American aircraft carrier strike groups, the French Charles de Gaulle carrier and four or five US Marines amphibian vessels will be posted there, debkafile's military sources report.