sorry to seem like the local cheesecake but what is an AAR?

i too have trouble roleplaying in medieval games... i always seem to remember the names of my generals up to turn 10 but then every one of them goes anonymous to me..

i find it hard to belive that players can do a whole campaign knowing every generals names/skill/retinue offhand.. am i doing something wrong? is there an easier way to do it besides memorizing? its easy at the start but the amount of characters builds up VERY fast