Belisarius' Byzantine invasion fleet of 533 was at least partly fitted with lateen sails, making it probable that by the time the lateen had become the standard rig for the dromon, with the traditional square sail gradually falling from use in medieval navigation in the Mediterranean. Unlike a square sail rig, the spar of a lateen sail did not pivot around the mast. To change tacks, the entire spar had to be lifted over the mast and to the other side. Since the spar was often much longer than the mast itself, and not much shorter than the ship itself, it was a complex and time-consuming maneuver. Armament and tactics In the earliest times of naval warfare boarding was the only means of deciding a naval engagement, but little to nothing is known about the tactics involved. In the first recorded naval battle in history, the Battle of the Delta, the forces of Egyptian Pharaoh Ramesses III won a decisive victory over a force made up of the enigmatic group known as the Sea Peoples. As shown in commemorative reliefs of the battle, Egyptian archers on ships and the nearby shores of the Nile rain down arrows on the enemy ships. At the same time Egyptian galleys engage in boarding action and capsize the ships of the Sea Peoples with ropes attached to grappling hooks thrown into the rigging. Introduction of the ram Around the 8th century BC, ramming began to be employed as war galleys were equipped with heavy bronze rams. Records of the Persian Wars in the early 5th century BC by the Ancient historian Herodotus (c. 484–25 BC) show that by this time ramming tactics had evolved among the Greeks. The formations adapted for ramming warfare could either be in columns in line ahead, one ship following the next, or in a line abreast, with the ships side by side, depending on the tactical situation and the surrounding geography. The primary methods for attack was either to break through the enemy formation or to outflank it. Ramming itself was done by smashing into the rear or side of an enemy ship, punching a hole in the planking. This did not actually sink an ancient galley unless it was heavily laden with cargo and stores. With a normal load, it was buoyant enough to float even with a breached hull. Breaking the enemy's oars was another way of