 Eight current Army National Guard units ( 101st Eng Bn , 103rd Eng Bn , A / 1 @-@ 104th Cav , 111th Inf , 125th QM Co , 175th Inf , 181st Inf and 198th Sig Bn ) and one currently @-@ active Regular Army Artillery battalion ( 1 @-@ 5th FA ) are derived from American units that participated in the Battle of Princeton . There are only thirty current units of the U.S. Army with colonial roots . 
