Frankish forces led by Louis the Younger <a href="https://en.wikipedia.org/wiki/Battle_of_Andernach_(876)" id="mwGw" rel="mw:WikiLink" title="Battle of Andernach (876)">prevent</a> a West Frankish invasion and defeat emperor <a href="https://en.wikipedia.org/wiki/Charles_the_Bald" id="mwHA" rel="mw:WikiLink" title="Charles the Bald">Charles II</a> ("the Bald").