Complex sentence: During this battle, the 6th Maryland Regiment was led by the notorious Colonel Otho Holland Williams and fought alongside the 4th Maryland Regiment and the 2nd Maryland Regiment to make up the 2nd Maryland Brigade.
Split into simpler sentences: During this battle, the 6th Maryland Regiment was led by the notorious Colonel Otho Holland Williams. Moreover, the 6th Maryland fought alongside the 4th Maryland Regiment and the 2nd Maryland Regiment to make up the 2nd Maryland Brigade.