the 186th infantry regiment is a combat regiment of the united states army made up of soldiers from the oregon army national guard. the 1st battalion of the regiment is currently active and as of february 2007 stateside, however, individual members are in iraq as replacements for other active duty units. the 1/186th's higher headquarters is the 41st infantry brigade combat team, headquartered in tigard, oregon. its higher headquarters, in turn, is the 40th infantry division