Were The Nubians Cowards?

I say no. Proof is in the plates taken from various places, but even more conclusively is the following from William Y. Adams, author of Nubia, Corridor to Africa:

"Egyptians...invaded the region again and again, yet seldom referred to it without the epithet 'miserable' or 'abominable'. {I as the author of this blog feel this was only propaganda to give the Egyptian troops a psychological edge because they were afraid to fight the Nubians.} Cambyses, the Persian conqueror of Egypt...ascended to the Nile as far as the Fourth Cataract, but he nearly lost both his army and his life on the return march. A Roman army reached and sacked Napata...yet Nero declined to annex Nubia...and Diocletian abandoned even the northern extremity...Arab armies which elsewhere swept Christianity from the face of North Africa...concluded a treaty (with) Nubia...Salah-ed-Din...conqueror...of Egypt and Syria, gave up all thought of adding Nubia to his domainafter the briefest of forays."

Remember: Nubians helped create the First Dynasty of Egypt and were greatly skilled and honored for their fighting ability.