The U.S. Army has kept an alert brigade of roughly 4,000 paratroopers in the 82nd Airborne for crisis response like this.

U.S. PRESSES IRAQ TO PROTECT AMERICAN PERSONNEL AFTER EMBASSY ATTACK: ‘THERE WILL BE NO BENGHAZIS’

There are roughly 5,000 U.S. troops currently deployed to Iraq now, among the roughly 60,000 U.S. troops currently deployed to the region. According to the Pentagon, 14,000 have been added since May as the threat from Iran increased.

The aircraft carrier USS Harry S. Truman has been in the Gulf of Oman, its strike group armed with hundreds of Tomahawk cruise missiles in addition to the dozens of strike aircraft aboard Truman.

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More than 100 U.S. Marines arrived at the U.S. embassy in Baghdad earlier Tuesday to help bolster security after the mob of Iranian-backed Shite militiamen tried to storm the U.S. embassy in Baghdad.

The crowd attacked the embassy following funerals for 25 Iranian-backed fighters killed in U.S. airstrikes Sunday in Iraq and Syria–retribution for an American defense contractor killed in Iraq Friday, according to U.S. defense officials.