Teikoku Toshokan - A GCS Library

Sanada Yukimura
I - Siege of Oshi (Normal/Hard)
II - Siege Of Ueda (Normal/Hard)
III - Battle Of Sanada Maru (Normal/Hard)
IV - Battle Of Domyoji (Normal/Hard)
V - Battle Of Tennoji (Normal/Hard)
Sweep Rewards :1 Sanada Yukimura Fragment, 10 Ban-Kin, 5 Meteoric Iron. (Normal) / 2 Sanada Yukimura Fragment, 20 Ban-Kin, 10 Meteoric Iron, (25%) Combat Rations. (Hard)

Whew, updated!
The formatting on this post is such a nightmare now, but I managed to get stuff added. Hope this helps!

1. Below -100 relations will cause the faction to declare war on you. Below 0 will cause them to break a passage agreement. Below 50 will cause them to break an alliance. Somewhere around the -50 range will cause them to demand tribute, although it's pretty nebulous and they tend not to extort you if you're significantly stronger than them. Above 100 they also tend to start asking you to help in their wars, declining that will cause a relation drop.

2. Yeah, they will still hate you for fighting the Shogun, very odd. You can test that easily by declaring war on Ashikaga after Miyoshi goes to war. Even worse is that if they kill the Shogun you get a -10 relation penalty with them for 25 turns, kinda like if you had killed the Shogun just with them. But it's an easy way to avoid the massive penalty with everyone if you do end up at war with the Shogun.

3. Since mobility is very important in conquest, my recommendation would be to get a horse. Any one of the +3 mobility ones are fine, our goal is to get all three eventually.

Glad my guide was of help, and sorry that it hasn't been updated in forever. I'll get to that eventually.

It kind of isn’t. I kinda think that going out and fighting like 90% of the map is actually faster since conquest is usually much cheaper than allying/subjugating. Though that’s harder and takes more effort to do. I always kill Ashikaga.

I also only recommend doing the normal victory conditions rather than completing a whole conquest on normal mode since there’s no rewards for doing that beyond the S-rank achievement. And you can complete that in challenge mode. And challenge mode is kinda… wild. Not exactly hard but considerably more complicated.