At least you’re honest. First check out the getting started guide, I’m biased but it’s a great introduction to memory techniques, and explains memory palaces very well. This will help you.
I was going to suggest a room for each war, but that’s quite a lot of information; you’ll probably need a small house. Check this page for ideas on creating journeys(see “Thirdly”).
Title of the war would go on the front door of the house(or the front side of it, or front lawn, etc.) Lets use The American Civil War, since you didn’t’ give an example. First image that pops into my head is a gentleman dressed in a suit and tie aiming an old rifle(Courteous, polite). Whatever pops into your head first works. You could also use something that sounds similar or whatever reminds you of the name.
Probably best to use a room for each of the things you mentioned. First room, causes. Just going off of wikipedia: Slavery, States Rights, Sectionalism, Protectionism, Slave power and free soil, Territorial crisis, Lincolns Election. Organized in no particular order, you would have in this room anything that represents slavery(pretty easy to imagine), States rights- I imagine the state of california holding a marijuana leaf, Sectionalism- Bunch of states arranged like jigsaw pieces, Protectionism- a shield, Slave power and free soil- Slave holding his fist up and in his other hand holding dirt with a small plant in it. Territorial crisis- two farmers on either side of a fence arguing, Lincolns Election- Lincoln being sworn in with hand on bible.
It’s probably best to know what all of those terms mean and represent, that way you can have images better matched to the actual meaning and how it correlates to this war, but this is just an example.
Second room: Events that took place. First of all, something that represents start, first, or beginning to you, connected with the year(or date); to me that’s a guy holding a gun into the air and shooting(like in a race) while Tim Ferriss goads him(1861). Then, around the room in chronological order would be major events, like Emancipation Proclamation, Anaconda plan, Battle of Ironclads, Battle of Pea Ridge, Fall of Vicksburg, etc etc etc…
For those examples: Emancipation Proclamation: I imagine Lincoln reading from a scroll on some balcony, and below him chains fall off from slaves, and Tim Ferris(18) then sticks a giant piece of gum(63) onto Lincolns face. Anaconda Plan- I imagine a giant snake, and it’s head is getting shopped off by a kukri(there’s this one kukri in a game that’s called the anaconda kukri), and then connect that with whatever the date was. Battle of ironclads, people in full iron armor(like EXCESSIVELY armored) fighting, Battle of Pea Ridge- Fighting on a giant pea, Fall of Vicksburg-Imagine my friend Victor(vic) falling… etc etc
Then you do the same thing for the aftermath- new room, and the reasons.
Hope this helps,
Bateman