What protected egypt from an invasion?

The Egyptians were protected from invaders due to their geographical features.

Explanation:

They had the Mediterranean Sea to the north along with the Nile Delta. This body of water blocks off land on the other side. Furthermore, the cataracts in the Nile to the south protected the Egyptians from lands below them.

the answer is )multiethnic

the  seven  days  battles  were  a series of seven battles over seven  days from june 25 to july 1, 1862, near richmond, virginia,  during  the american civil war. the  seven  days ended with mcclellan's army in relative safety next to the james river, having suffered almost 16,000 casualtiesduring  the retreat.