significantly Egyptianized. The city-state of Napata was the spiritual capital of Kush and it was from there that Piye (spelled Piankhi or Piankhy in older works) invaded and took control of Egypt. Piye personally led the attack on Egypt and recorded his victory in a lengthy hieroglyphic filled stele called the "Stele of Victory". Piye's success in achieving the double kingship after generations of Kushite planning resulted from "Kushite ambition, political skill, and the Theban decision to reunify Egypt in this particular way", and not Egypt's utter exhaustion, "as frequently suggested in Egyptological studies." Due to archaism, Piye mostly used the royal titulary of Tuthmosis III, but changed the Horus name from "Strong bull appearing (crowned) in Thebes" to "Strong bull appearing in Napata" to announce that the Kushites had reversed history and conquered their former Thebaid Egyptian conquerors. He also revived one of the greatest features of the Old and Middle Kingdoms: pyramid construction. As an energetic builder, he constructed the oldest known pyramid at the royal burial site of El-Kurru. According to the revised chronology, Shebitku "brought the entire Nile Valley as far as the Delta under the empire of Kush and is 'reputed' to have had Bocchoris, dynast of Sais, burnt to death". Shabaka "transferred the capital to Memphis". Shebitku's successor, Taharqa, was crowned in Memphis in 690 BC and ruled Upper and Lower Egypt as Pharaoh from Tanis in the Delta. Excavations at el-Kurru and studies of horse skeletons indicate the finest horses used in Kushite and Assyrian warfare were bred in and exported from Nubia. Horses and chariots were key to the Kushite war machine. Taharqa's reign was a prosperous time in the empire with a particularly large Nile river flood and abundant crops and wine. Taharqa's inscriptions indicate that he gave large amounts of gold to the temple of Amun at Kawa. His army undertook successful military campaigns, as attested by the "list of conquered Asiatic principalities" from the Mut temple at Karnak and "conquered peoples and countries (Libyans, Shasu nomads, Phoenicians?, Khor in Palestine)" from Sanam temple inscriptions. László Török mentions the military success was due to Taharqa's efforts to strengthen the army through daily training in long-distance running and Assyria's preoccupation with Babylon and Elam. Taharqa also built military settlements at the Semna and Buhen forts and the fortified site of Qasr Ibrim. Imperial ambitions of the Mesopotamian-based Assyrian Empire made war