Bah, come on :D

Okay, tell me the location of three battles happening more or less at the same place, each of them featuring a surprise attack by at least one party. Two of them took place at the very same spot. All of them were won by the same side. All the three commanders of the victorious parties gained a prestige position within a year from the battle.

The first two battles are quite clear for me:

Battle of the Morannon - took place between Dagorlad and the Black Gate - was a surprise attack by Gondor and Rohan, as Sauron had not expected this, perhaps the arrival of the eagles was another big surprise - was won by Gondor and Rohan - in this case both Aragorn and Eomer became kings of their kingdoms

Battle of the Camp - took place close to Dagorlad in northern Ithilien - there was a suprise attack by the Wainriders against the northern army, later also a surprise attack by Earnil against the Wainriders - was won by Gondor - Earnil became king

The third I suppose should be:

Battle of Dagorlad - took place on Dagorlad - perhaps here the attack on the Elves of Lorien led by Amdir who were pushed into the Dead Marshes - was a victory for Gondor - bit difficult here concerning the commander, it would have to be Elendil, but already had a prestigious position

Well, as you see, no, that's not it, there are things which don't fit. Note please that I am asking first and foremost about the location of these battles, not about the names of the battles themselves *hint hint*. Yes, we might be talking also some battle(s) which did not exactly earn a name... battle(s) nonetheless, but not necessarily battle(s) with big B (but important enough to be possible to know, nothing totally random and obscure).