Complex sentence: He was a commissioner of array for the King in 1642, stood security for loans amounting to £60,000 and helped to raise two regiments of horse, which he commanded at the Battle of Edgehill.
Split into simpler sentences: He was a commissioner of array for the King in 1642. He stood security for loans amounting to £60,000 and helped to raise two regiments of horse for the King, which he commanded at the Battle of Edgehill.