Sort of true but the other thing to realize is the Dominion is currently making one of the biggest tactical no nos out there.
The Thalmor are trying to do everything at once. They can't rebuild because they need to spend resources keeping the empire in check. They also need to keep trying to sabotage Hammerfell from the inside. They also need to keep independant factions like the college of Winterhold in check.
They also incited the civil war to create chaos. The only time you tactically need chaos like that is when you are incapable of defeating two enemies at once.
Incorrect. It was winning battles and territory left and right but it was doing so too quick and instead of what it did during the golden age of building up it's territory it was expanding without thought so the newly conquered areas quickly rebelled and earned independence once more. This forced the Military to back track and retake those territories by leaving the front lines unguarded.
Rome's millitary failed in the same way that The Empire's is. Both did not understand millitary strategy.
The Empire regained the imperial city after a long series of battles during witch the Empire was gaining strength once more and the Thalmor was losing it.
The best time to continue an offense is when the enemy is withdrawing.
Tactically the Empire should have continued it's offense and driven the Thalmor out of it's territory but instead the Empire wanted the quick way out.
The Thalmor did another millitary no no. It overstretched itself. It drove a hard offensive deep into the empire without thinking about it's own longetivity.
The Empire should have exploited this weakness.
Tactically the Empire is a mess.