211th Military Police Battalion, a unit of the Massachusetts Army National Guard
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211th Rescue Squadron, a unit of the Alaska Air National Guard that flies the HC-130 Hercules
Under threat of a possible Japanese air attack, the 211th occupied hastily-built battery positions to provide 24-hour air defense for Mare Island Naval Shipyard and Hamilton Field.
The brigade was formed on June 4, 2007, with command in Niš from the former land forces units located in eastern Serbia; the 211th Armoured Brigade from Niš, the 125th Motorized Brigade, 549th Motorized Brigade, 4th Motorized Brigade, the 352nd Engineer Regiment from Prokuplje, the 52nd Artillery-rocked Air Defence Brigade and several other smaller units.