Complex sentence: In ancient Greece the Hoplite was a common form of heavy infantry, armored with a bronze helmet, breastplate, and bronze-coated shield, all of which were designed to block arrows and blows from spear points and swords.
Split into simpler sentences: In ancient Greece the Hoplite was a common form of heavy infantry. The hoplite armor and shield were designed to block arrows and blows from spear points and swords.