re: Which war [ever] do you feel had the most impact?
Hatshepsut's rout of the upper Egypt encroachers and the Nubian revolt.
It was a glorious battle and secured peace in Egypt long enough to create the first wise and peaceful era (about 25 years worth) in recorded human history. That became the goal to shoot for for all succeeding generations that remembered the golden days under Hatshepsut.
And she was "lovely to look at, graceful in her movements and fragrant as a flower" - and that was an understatement she wrote of herself, "My skin is that of pure gold…I have no equal among the gods who were since the world was."
Ah those were the days...
;-)