The origins of the Twenty-six Dynasty are from Sais (Sa-Alhajar) in the west of the Delta. Psmatic I occupied the throne of Egypt after the Nubian King, Tanut Amoun, had disappeared. According to Manetho, he was the fourth king of this dynasty, whose reign over Egypt extended almost over 150 years.

King Psematic I ( Wah Ib Ra ) 

Son of Nakau, prince of Sais, he was crowned with the name of Wah-Ib-Ra. Reigning for 54 years, he managed to expel the Assyrians from the Delta and to reunite the country under his rule. Psematic I formed alliance with Gyges, King of lydia, who sent him mercenaries and thus was able to expel the Assyrians out of Egypt. As Ahmose did, he followed them till Palestine besieging Ashdod (their fortified city) for 29 years (according to Herodotus) until he captured it. After the Delta was set free, Psematic I directed his efforts towards the Upper Egypt, and he could convince Montuemhat, the Governor of Thebes and The Divine Wife of Amun, Sheb-n-Obet II, to keep their jobs, on condition that Shen-n-Obet adopts his daughter Neth-Kret (Nitocris), who ruled after her with the name of Sheb-n-Obet II.
Psematic I restored many monuments in Sais, Memphis and Thebes. He formed an army with Greek and Mediterranean mercenaries. During his reign, a movement to recover the roots of the Egyptian Civilization in the religion and art emerged. Putting the foreign gods (such as Baal and Astarte) aside, Egyptians revered their national gods (such as ptah and Neith). They recovered the texts of the pyramids and followed the artistic styles of the Ancient Kingdom in painting and sculpture.

King Nakau II

Nakau II, son of Psematic I, succeeded his father and he ruled for 15 years. He was the first to begin the project of linking the Red Sea with the Mediterranean through the Nile. 120000 people died in the works of this channel, but he stopped the work because he received a prophecy saying that this channel was in benefit of the barbarian (foreigners). The channel was completed by the Persian Dara. Nakau II formed a strong army and he defeated the Syrians in Meggido. But he was defeated by the Babylonian King Nabucodonsor. He also sent an expedition that rounded Africa in a span of three years.

King Psematic II

Psematic II ruled Egypt after his father for 19 years. During his reign, Nabucodonsor, the Babylonian King attacked Jerusalem, allied of Egypt, and captured its army. Soldiers of Jerusalem escaped to Egypt, and were received by Ibris, who gave them refuge in Elephantine. Ibris had to send troops to lybian who asked him for help against the Greek expansion, but this time he sent Egyptian soldiers as he knew they would not fight against their nationals. The Egyptian army, led by Ahmose, was ambushed and most of its soldiers died. This caused a rebellion against Ibris who was killed and Ahmose was later elected as new king.

King Ahmose II (Amasis)

Ahmose II ruled Egypt for about 44 years. At the beginning, he had to undertake solving the problems between the Greek and the Egyptian soldiers. He could satisfy the Greek giving them Nocratis as a purely Greek city, which became a trade center between Egypt and the Hellenistic World. He also satisfied the Egyptian substituting the Greek mercenaries by Egyptian soldiers in the Egyptian borders. He died on 526 BC. Psematic III succeeded Ahmose II and ruled for two years, when he committed suicide after being defeated by the Persian King Cambyses in Pelosium.