The Pentagon has deployed about 100 troops — including more than 50 Marines attached to a Fleet Antiterrorism Security Team to the U.S. Embassy compound in Baghdad, Iraq, to help protect diplomatic personnel and property.

Meanwhile, President Obama is considering miltiary action against the Islamic insurgents, who have seized vast swaths of northern Iraq and are moving south toward the capital. Several U.S. warships have moved into the Persian Gulf, where they provide “the commander in chief additional options to protect American citizens and interests in Iraq, should he choose to use them,” said Rear Adm. John Kirby, a Pentagon spokesman, on Monday.

The arrival of FAST Marines and a contingent of U.S. soldiers on the ground in Iraq on Sunday marked the first operational deployment of U.S. troops there since the withdrawal of combat forces in December 2011. Pentagon officials declined to identify the Army unit deployed to Baghdad. The Marine platoon is based out of nearby Bahrain, and is tasked with protecting American personnel and property, said Master Sgt. William Price, a spokesman for Marine Corps Forces Central Command. […]