But why did EA manage to beat a battle lvl fleet and then managed to get wiped out itself by a war lvl fleet........
There can be many, many reasons. . .
Fresh forces vs. war weary troops.
Not having fought a major war for 1000 years doesnt breed the best tactics.
Same problem as above, but part of strategy rather than tactics. Fighting a raid war across half the LONAW while keeping many races contained, aka short visits just to scare em a little, makes better supply lines on the Dilgar side.
Fresh forces vs war weary troops?
At a start of a war, both sides can expect to have fresh forces, the EA have extremely confident soldiers, they did just kick Dilgar ass didnt they? And Minbari are saddled by a bad emotional state. Good for Close combat fighting, bad at the battleboard.
Thats the toughest nut, but comparing Dilgar "We want to kill every single race out there." to Minbari "We only hate shadows and peeps that make mistakes by attacking us." I guess on a percentage basis the Dilgar have the bigger fleet. Now about imperium size? hrm thats the catch not truly known. But the advantage cant be good enough that Minbari would not lose a single ship.....
Because the plot said so?
The big guy said B5Wars is canon. ACTA isnt.
It still doesnt make sense.