I have to ask is there a cheat that can force AI into agreeing to a White Peace without ending the war with other nations? Or outlaw slavery in the US.
http://www.victoria2wiki.com/Console_commands
The tldr version:
Type (debug?) yesmen into the console and the AI will agree to your white peace request. As long as they are not the war leader everyone else fights on.
Type yesmen again to disable the cheat.
There is no easy way to outlaw slavery once the slavery debate has fired. Before then you can just type
militancy 10
to increase your nations militancy (at which point the conservatives in your upper house will agree to the reform). Then just type militancy -10 to decrease your militancy to previous level
I growing tired of trying to play as the US and getting jumped on by the British even when I put the time in having plus 200 relations and making damn sure Mexico hasn't allied with them or been collected into their SOI.
The UK does not need to have sphered mexico to intervene. All they need to do is have friendly (influence) relations. Have you tried decrease their influence relations down to hostile? Because it is literally impossible for them to intervene in the war if they are not in an alliance and dont have friendly+ relations, (though they can fight a separate war, especially if you lose enough military units that they think they can win it).
EDIT:
As to the British and the Mexican-American War I'm not sure. One minute I was kicking Mexico's ass the next thing I noticed the British were at war with me demanding a status quo peace with the Mexicans.
As to why the AI is being that aggressive is beyond me but I don't have the first fucking idea. But I been getting my ass handed to me by the AI.
If they demanding the status quo this means they are at friendly (influence) with Mexico. As mentioned above, this can easily be avoid be destroying their influence with mexico before hand. What likely happened was when you started the war they were cordial with mexico, and then they increased their influence to friendly.
Then once game I did saved and gave up on the Mexican Cession for the time being only to get into a nasty civil war in which saw the CSA get in army to Detroit somehow? After I saw that I gave up on the US.
Tried France next only to get jumped on by Prussia in the 1840 after I had just knocked off Sardinia-Pidmont and made gains in Europe and had knocked out that one uncivilized nation just south of French Algeria in 1836. The first one was a war of aggression the second I was called to defend the Papal States from Sardinia-Pidmont who was trying to create Italy early. I had my ass handed to me by Prussia and fell into revolution soon there after.
Then I tried my luck as Japan. I couldn't turn it into a civilized nation by the 1860s even through I had Literacy rate up to 50% and had most of the second R&D tier unlocked and finished. I tried to invade Hawaii only to get jumped on by the British and Americans.
Less said about my efforts as Prussia the better.
Then finally I tried the British as they had caused by so many headaches. Only I was jumped by the Spanish and Russians in 1837! By 1840 I was getting the upper hand even after Sardinia-Pidmont joined in. Then I got jumped by an odd alliance of Prussia and France!
What the fuck an I doing wrong in this game?
It sounds like you need to work on your control of your military. The CSA for example should always be a fairly easy push over unless you are fighting a foreign war at the same time.
Several tips in regards to that
1. As far are techs are concerned army leadership tech tree is really really good. (The morale and tactics bonuses it gives greatly decrease the damage your units are taking). Medicine is also a must have tech, as its inventions stops your soldiers pops from being completely obliterated.
2. Click on some of the battles and see:
a) What bonuses both armies have. Are you troops taking a negative bonus because you are attacking across a river? Or because they have no leader or a crappy one? Etc. Not attacking in the wrong place could ease many of your military difficulties
b) How is your army composition forming up vis a vis the opponent. Do you have artillery (if the answer is no, get some)? Is your artillery in the backline (if the answer is not yes you need to add more infantry to your army comps)?
3. How bad is your army suffering attrition in enemy territory? You generally want your troops in smaller stacks to avoid attriting down to nothing over time
4. Check and see how much of your supplies your units are getting. If your military is not getting their proper supplies, they are going to reinforce much more slowly
5. On a related note, how big are your army stacks. I generally find that a 30K stack works well in that they are big enough to not be destroyed, but not so big as to horribly suffer attrition. Moreover, the smaller size ensures you can more easily cover your entire border and get the AI to attack you, at which point you just reinforce your army.
Moreover, the AI usually only jump you when you are near the end of a protracted war that has non trivially diminished your military strength. The fact that you are getting jumped by Spain, Russia, France, and Prussia in one game suggests
a) You have somehow managed to weaken your army to the point that the great powers feel perfectly confident in attacking you
b) You have accidentally (or deliberately) started a war with the great powers by warring on their ally on someone they have friendly+ influence on, or by joining in on your allies war despite the fact it might not be in your best interest.
c) you manage to go over 25 infamy.
For c), DONT DO THIS unless you are prepared to fight anyone and everyone
For b) be perfectly willing to dump your ally if they are a liability. When you go up against someone like prussia/germany, you want to start the war on your terms, preferably with calling all your (great power) allies, and not because you were called in by an Italian minor. Also be careful on who you declare war on. If a great power has friendly+ influence on a nation, they can and will go to war to defend it.
Also be very very carefuly before you fuck with prussia. Most games where your not actively involved with europe will see Germany rise and kick the crap out of everyone else, and there is a reason for that. They have the pop, industry and tech to destroy several of their great power neighbors simultaneously. The only times they dont do so is when some combination of Austria,France, and Russia manages to strangle them in the cradle, and I have seen games where they manage to beat all three at once.
For a) I would thus suggest spacing out your wars a bit more to give your army time to rebuild. You don't need to fight 2-3 wars before 1840 to not have a global powerhouse by the endgame.
Even against uncivs, you will quickly find yourself attritioning your army to an early grave. Doing well in victoria 2 is just as much as figuring out what wars you should avoid fighting, as it is figuring out the exact right moment to shiv your geopolitical rival.
A word of advice, dont try play an unciv until you figure out how to play a civilized nation. Uncivilize are for the most part alot hard to manage.