The troubled Egyptian situation during the 1st millennium BC, i.e. the almost permanent internal and external tensions, must be considered in its wider historical context. Due to a political fragmentation, the relatively weak Egyptian state meant it was unable to effectively and for a long time interfere in the politics of the eastern Mediterranean states.
The Assyrian kings with their expansionist policies lost no time in attacking Egypt. However, all their military triumphs were always short-lived.
This situation was remedied by the Saite dynasts. They not only reunited and successfully ruled Egypt (664-525 BC) but met on the battle field with the new powerful empire from the East - Persia.