The Imperials abandoned every province but Cyrodil when things went bad.
During the Great War, the Legions didn't leave Hammerfell until the last year of the war. Things went bad during the first year, yet Legions upon Legions went into Hammerfell the same as Cyrodiil.
In regards to Morrowind being abandoned. That was because majority of the Legions were in the provinces. Cyrodiil was the least defended at the time, and suffered the worst of the invasion. Many Legions were recalled to reinforce Cyrodiil. Oblivion Gates opened right in the middle some Imperial forces, wiping many out.
They FORCED Hammerfell to secede from the Empire when Hammerfell refused the White-Gold Concordat and fought the Thalmor.
Hammerfell forced the Empire to release them. They had refused Imperial rule, with the Legions unable to even leave Cyrodiil for two years. The Empire had the choice to either, reject the treaty and the Empire falls apart due to internal problems such as riots and loss of control. Or they could invade and attack the Redguards to comply with the treaty. Better to release them.
Plus, Ulfric treats you like an invaluable GOD, not some lowdown soldier who should bow to the might of the Empire. Not to mention, kinda hypocritical to join the Legion and then kill the Emperor.
Ulfric treats you like a political tool, using you to further himself in his last speech. Tullius treats you like a Legionnaire because that is how they are, they fight as one. What makes your character more special than the Nord/Imperial Legionnaires who stormed the forts with you.
It isn't really hypocritical to join the Legion and kill the Emperor. Talos Cult comes to mind, members of the Legion were planning on assassinating Uriel VII.
Imagine how Hammerfell is, or Blackmarsh...
Hammerfell. Devastated, left with half of their province in ruins?
Black Marsh... well they killed everyone they considered tainted by outsider influence. So I wouldn't use that one as a role model.
seriously? There is a whole thread on this, but I would not recommend reading it.
Yeah, but people like creating new threads. Nothing wrong with it, also gets the topic on track. The other thread mainly derails every seven posts.