Complex sentence: Also known as the Battle of Poindexter's Farm, the clash involved over fifty thousand soldiers from each side, hundreds of pieces of artillery and three warships, and was part of the Peninsula Campaign's Seven Days Battles.
Split into simpler sentences: Also known as the Battle of Poindexter's Farm, it involved over fifty thousand soldiers from each side, hundreds of pieces of artillery and three warships. The battle was part of the Peninsula Campaign's Seven Days Battles.