Raids and attacks by the Nubians from the South and
Philistines from the East greatly weakened the New Kingdom leading to a period
of decline that would continue for the next half a millennium. The civilization
was rife with internal conflict and this was greatly compounded by low flooding
of the Nile that further damaged its economy (a possible early impact of climate
change). Religious relations between the various power brokers were never
fully resolved after the Amarna Period which further strained society. Like
future Ancient civilizations (the Romans in particular) the Egyptians were
forced to use foreign mercenaries to defend their territories. Situations of
dual loyalty were a natural consequence of such policy.
In 940 BCE Egyptian was conquered by the Libyans who founded
their own dynasty
(XXII). Two centuries later the Nubians overran Egypt
establishing the XXVth dynasty. Both
Assyria (652 BCE) and Persia (525 BCE) would later dominate Egypt as well. Other
foreign powers that controlled Egypt over the next two and a half millennium include the Macedonians, Romans, Arabs, Turks and British.