William H. Paul
He was awarded his nation's highest honor for valor in combat , the U . S . Medal of Honor , for saving and protecting the regimental flag of the 90th Pennsylvania Volunteers during the intense fighting of the Battle of Antietam in Maryland on September 17 , 1862 . 
<triplet> Battle of Antietam <subj> September 17, 1862 <obj> point in time