Battle of Wilson's Creek
The Battle of Wilson's Creek , also known as the Battle of Oak Hills , was the first major battle of the Trans-Mississippi Theater of the American Civil War . 
<triplet> Battle of Wilson's Creek <subj> Trans-Mississippi Theater <obj> part of <triplet> Trans-Mississippi Theater <subj> American Civil War <obj> part of <triplet> American Civil War <subj> Trans-Mississippi Theater <obj> has part