Complex sentence: Argishtis I of Urartu conquered Latakia from the Hittites, and reached Byblos, Phoenicia, and he built the Erebuni Fortress, located in modern-day Yerevan, in 782 BC by using 6600 prisoners of war.
Split into simpler sentences: Argishtis I of Urartu conquered Latakia from the Hittites, and reached Byblos, and Phoenicia. He built the Erebuni Fortress, located in modern-day Yerevan, in 782 BC by using 6600 prisoners of war.