Iran

The 173rd Airborne is the Army's rapid-response unit for Europe.

A prank story on social media says that the 2nd Marine Division is involuntarily mobilizing Marines from the IRR.

U.S. troops in Iraq will focus on force protection against expected retaliation for the killing of an Iranian general.

Arlington National Cemetery is tightening its security protocols and warning visitors to report suspicious activity.

The attacks came as the U.S. bolsters forces in the region in response to Iranian threats.

Maj. Gen. Qasem Soleimani had been planning attacks on U.S. troops and diplomats, officials said.

Many argued that it may be too soon to understand the implications and the steps needed to avoid escalated conflict.

More attacks from Iranian-backed militia groups may be possible, officials said.

The Marines are assigned to Special Purpose Marine Air-Ground Task Force-Crisis Response-Central Command.