On the Spanish Front: A Slightly delayed, but no less important primer on How we're going to do this: Part 1, the Theaters of War.
Spain is not a large country, at least in the grand scheme of total landmass. After all, France, Germany, Austria, and Russia are all very sizable in their own right.
But due to it being your shithole of operation, there are some things that must be said.
Spain, in the eyes of the French Army, is split into Five operational Zones.
Barcelona, Gibraltar, Madrid, and the center of the kingdom, the South which includes Seville, Northern Leon/Galacia (The North). These are the areas of operations that the French Army has delegated, as they decided that making more would only cause detriment and communications problems, and simplify orders.
Of course, Gibraltar has been made an area, particularly to avoid any more hostilities with British forces.
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Barcelona is where the French Headquarters is located, and if you remain there as Commander in Chief or military advisor to the Crown of Spain, will be where you will be dispatching reports, and making moves on an operational level. It is considered the safest region in Spain, with high French support among the populous and as well as the emergency capital of the French Kingdom.
Don Carlos, now King Carlos/Charles the Third, is serving as the monarch, but make no mistake, the French army is the real power here.
Many of the operational difficulties that you will take from this region are entirely based on a propaganda war, rearming, retraining, and reorganizing the Spanish Army that has been, at this point, completely annihilated by civil war, or fled to New Spain with the rest of the Spanish royal family. There is also the lingering bandit problem that must be dealt with, but in such a way that will not be seen as A foreign Army taking their frustrations out on the Spanish people, they are protecting.
Another very key issue here in Barcelona is the very real danger of having to leave for France in a hurry if hostilities break out elsewhere in Europe, which will make the choice of remaining in Spain, or joining the Rest of the Grand Armee difficult.
On the Tactical Level, you will need to be very diligent with the patrols and maintain order in the Army. Just because it is safe does not mean the men should ever slack off in their duties. And you will need to make sure that remains so.
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Going to the North, in Leon and the other northern counties and dutchies of the Spanish countryside, has another far more difficult problem. The civil war has left much of the civil and military authorities there weakened, or even none existent. With entire townships being led by clergy or bandit kings who are seeking to steal the wealth out from the people under them.
But this is no ordinary restoration of order. These men are well versed in asymmetrical warfare and have the loyalty... or the fear of the countryside to maintain supply, to maintain cohesion and strength, and in so verses, maintain contact with suppliers that wish to keep the chaos in Spain sowed, and harvested.
These warlords and bandits will not surrender to the authority of the French Army, as they see them as nothing more than invaders, getting involved in the business of the Spanish people.
Operationally, you will need to decide how you plan to bring law and order back to the Region. Do you spread the Army out and try to fight fires all over the North, trying to stem the tide of banditry, warlordism, and destruction, or do you come down like a hammer on one particular area, secure it, and hope for the best that the entire region does not burn down around you while you focus on restoring order?
Another thing to note: You will be Governor of this region in all but name. You will need to handle the many problems such as food, supply, medicine, humanitarian aid, policing.
Tactically, you will be mostly be allowing commanders of brigades and even squads do what needs to be done in their actions, and depending on your written orders (Write ins) they might be misunderstood.
Be Warned: The price for French soldiers in this region is high, and these men will fight savagely in turn to kill you, men. You may have to resort to savagery itself if you wish to stop. But do not give the Spanish people a reason to believe the propaganda against you. Do not give the Bandits a ready supply of support if you stoop down to their level.
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Madrid, and the Middle of the country, is a hotbed of political violence. The Center of the Republic is still burning from the riots and the revolution. While not nearly reaching the level of violence in Austria, the Republicans are still viewed with scorn and mistrust. There is a great deal of anger that needs to be answered and consoled between the republicans and monarchists if there is to be lasting peace.
Madrid itself is the capital of the Spanish kingdom and needs to be taken before there can be a truly reconstructive, legitimate government.
The problem is, there is no way of knowing if the City is willing to accept the King, and will fight like hell to stop the French who are marching through the country.
That means, that Operationally, besides dealing with the no less dangerous bandits, you need to win the hearts and minds of the Spanish people. Easier said then done, as you are going to need to battle not only the great tide of anti french sentiment that exists in the region, protect the many people that need protection, but also stop the British from ruining the chances that you have to reunify the country.
Tactically it will be far more... Nuanced. You will be dealing with situations that may not require violence... or require an extreme amount of violence. The situation is fluid.
But noneof the less important.
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In the South, and Seville, the name of the game, is Govenorship. The Bandits, either to afraid of the British or you, are leaving in mass to other regions.
That means that this entire region will need to be protected, and of course, smuggling cracked down on.
Operationally, you will be the governor of the region.
Tactically, there will not be much in terms of fighting.
What there will be, is politics. And how best to make these people accept the new regime. And the French part of that new regime.
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Gibralter.
Dont even think about it unless you are ready to start a world war.
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A note on Tactical Rolls, and Fog of War.
Unless you are in the region, you will not be privy to the tactical and on-the-ground reporting, relying heavily on the general's/Marshals reports to make notes and idea of the situation. They may be understating or overstaitng the enemy or the problems.
They may even be flat out wrong.
But know this. You will be in the blind for these regions, and you will need to trust your men to get things done.
And try not to make things to impossible or toxic at Headquarters.
Or allow them to make things impossible and toxic and headquarters.