Not going for Cyrodiil would mean the majority of the Legions able to go on the offensive and everything is open to a counter attack.
Not going for all of Cyrodiil. They should have kept with their plan of pinning down the Legions in Cyrodiil. Keeping a defensive war, close to reinforcements of Valenwood/Elsweyr. Pushing too far ahead too soon, simply left them spread out.
By definition, Battlemages don't use shields.
They fight alongside formations, there is no rule that Battlemages don't use shields. By definition they're a mix of warrior/scholar. Legionaries fight in formation, Mages attached to Legions fight also in formation.
The people will want someone to look to, dragons and war will probably leave a bit of an impact on a generation already scarred from the Great War. Even if the Legion is in fantastic shape (which it almost certainly isn't or the war would've begun already) you'll want to recruit from Skyrim so
a) You can have lots of talented warriors for the upcoming war
b) You can stop policing Skyrim and get back to the matter at hand
People look to different things. Chances are they will look to the legend of the Dragonborn, than anyone else. The Empire not rushing to war isn't a sign of Legions being in poor shape, in fact they have enough manpower to fortify the southern border, escort trade shipments across Cyrodiil and form up to march into Skyrim once Pale Pass is clear.
Tullius and Rikke don't even make mention of recruiting in Skyrim after the Civil War is finished. Unlike the Stormcloaks, they're not planning on building up any army, they have one in Cyrodiil. If large forces were required, Tullius and Rikke would have recruiting/training as a high priority. The only thing they're concerned with is bringing order back to Skyrim, and keeping the region stable.
Missing the Legion life has more to do with it being the only option at the time, not cause they loved upholding the Empire's ideals I'm guessing. I'm sure joining the army Ulfric is building will be just as much fun.
Joining the Legion is basically tradition among many Nord families. You hear Legionaries mention they joined because of their father, and father's father. Missing the Legion is an attachment, thinking back to your friends and brothers in arms. I don't see how to a rich powerful family it was "the only option" .
At that point it's just them and High Rock, and trade with them just got a hundred times more difficult. Skyrim meets all those as well, except the climate and crossroads one. EETC still operates in Skyrim.
Don't see how trade gets difficult, trade vessels travel from Cyrodiil to Skyrim and High Rock is closer. Climate is very important, it is mentioned that only Rorikstead is the only reliable farm in all of Skyrim. Yes the EETC still operates, but we don't know for how long. Ulfric intends to wipe out all "Imperial influences", EETC could be considered as one.
But their natural abilities will make training less time consuming. A large number of them are already experienced warriors. Former Legionaires are also the ones training them.
It doesn't make training less time consuming, not every Nord is a natural warrior. The Stormcloaks do some experienced people among their ranks, and former Legionaries will train them. But, what happens if the Great War were to break out right after the death of Titus Mede II or soon after the Cviil War ends? Are the Stormcloaks going to abandon Skyrim to join the war? Your standing army is made up of your Hold Guards and farmers/other tradesmen. You sacrificed your economy and Hold security to push out the Empire, that is a temporary solution.
You Stormcloaks are mostly Eastern Hold citizens. You killed majority of the Hold Guards/citizens who joined the Legion in the Western Holds. You had to replace those guards with your own, sacrificing the security of the East to secure the West. Windhelm doesn't have enough guards, Dawnstar is lacking, Riften etc. Now this also effects the Western Holds under your control, Markarth alone is demanding extra Stormcloaks to enslave and suppress the Forsworn, Falkreath is pleading for forces to defend Skyrim from Cyrodiil Counter-attack (Although the Legionary Veterans hidden in the Hills might stop that letter from even reaching Ulfric).
Now comes economy concerns, you're made up of large numbers of farmers and other tradesmen. Who replaces them? They joined to push out the Legion, I doubt many of them thought through what consequences would happen without them farming/repairing/selling things. You also see this in Eastmarch where the Mill lost all it's workers to the war, without anyone thinking about the arrows that are made from the wood supplied. You no longer get the free resources and food from the Empire, so things like this will have major consequences.
So if the war was to break out right after the Civil War. Ulfric's plan is to take the entire army to the Dominion. You're either f*ucking over all of Skyrim majorly to fight this war Ulfric plans to lead you towards or you're sitting it out while iron out the "minor details".
But they can go wherever they want, and they have bases of operations in every province. Espionage inside the Dominion will be harder than ever, and in Alinor impossible, while Imperial generals are playing host to Justiciars. The next war is obvious, but if a Thalmor operative were to find information about when or where (which could be across the street from one of their embassies), that could jeopardize everything.
They can't go wherever they want. Thalmor Justiciars only have the power to ensure the White-Gold Concordat is followed, and are only allowed increased presence if there is a large open violation (Them using the Civil War as an excuse to launch a large inquisition in Skyrim).
Tullius has to deal with the Thalmor because he is in Skyrim under a political fashion, as well as a Military function. He's the Military Govenor of Skyrim, acting head of state.
Where the next war will be? Where the armies are.
Think about how effective Thalmor espionage was before, and now the Empire has open doors.
Just lets us round them up, cut off their heads and mail Alinor with an Ultimatum of our own.
Still, Skyrim could get by without importing everything. Whiterun on its own supplies food for the whole province.
No Whiterun doesn't. The area surprisingly is considered poor for farming, hence why Rorikstead is rumored to use magic. Those who do succeed end up quite rich, hence how the Battle-Borns came into wealth. There are farms all over Skyrim that provide what little they can.
That would be High Rock's local forces guarding Wayrest anyway, not the legions.
You don't know that, Markarth wasn't guarded by Skyrim's local forces apparently but had Legions. There is conscription at times, or when Legionaries are loaned to counties and local rulers.
Well didn't Ivory say there are severe spiritual consequences if they use too much of the forest?
Only Valenwood Bosmer who do it. Altmer, other races are fine. With Elsweyr as a client state, gathering workers won't be too hard. Both Elsweyr and Alinor practice slavery.
Whiterun had plenty of warning, and I'd imagine the fireballs were aimed at specific, military targets. Still not as bad as encouraging mercanaries to do what they wish with civilians.
They didn't have plenty of warning, the catapults were a surprise but the Legion had prepared water carriers just in case. Aimed at Military targets? What my house and Belethor's shop? They're catapults, not smart missiles. There were Civilians running around screaming, with guards/soldiers yelling at them to get inside.
The Empire doesn't encourage mercenaries to do as they please, that was just me saying they could. In fact there were some mercenaries in Cyrodiil who were punished for raiding a civilian trade caravan. Probably put to death or sent to prison/contract torn up.
That is why you send the mercenaries in first. Weakens the enemy and means less people to pay after the war ends.
Destroying the Empire is a means to an end. Lorkhan is the most unholy thing imaginable to them, and therefore mankind isn't far behind.
The Thalmor seek to recreate a new Merethic Era, Elven domination. That requires the Imperial Empire to be gone, because the Thalmor view themselves as the true rulers of Tamriel. Mankind is more something to be enslaved.
Reckless stuff:
Breylna's experiment
J'zargo's experiment
Arniel's experiment
The decision to remove the Eye from Saarthal
Going to Saarthal in the first place
Letting Ancano in under no obligation to do so
Aren's actions at the Librythian
I would say telling the Nords to suck it up is a bit unfair, it's their lives and homes on the line.
So they shouldn't do research?
If you remark that dangerous research must be a problem, he will explain: "Not often, no. Some risks must be taken, to be sure. I am simply trying to avoid untimely deaths. We also must make an effort to avoid worsening what Skyrim thinks of us."
They removed the Eye from Saarthal, because it was the best option. To study, but also to safeguard from others. They went to Saarthal to simply study, gather little artifacts, study ancient wards, check out some pots. Didn't intend to look for the Eye.
Aren's actions at the ruin? You mean freezing the Dragon Priest in time? Going there wasn't his idea, it was that female Mage in the party. Also I'd hardly blame the College, they were left in the dark.
I'll give you the Thalmor fellow, but they did not know what he would try do.
They should suck it up. For thousands of years it was their pride and joy having the College. Then the Oblivion Crisis happened, and instead of thanking the College Mages for defending Skyrim against Oblivion Gates and the Mythic Dawn Cult, they were shunned. Then the Great Collapse happened, but of course it had to be the College's fault.