ASAD said:
What I can't annex Burgundy.For ever?
I must be some way make such conditions that it be possible.
Or not?
Hum, sorry. I think we've all forgotten to solve your problem.

o
Like you can see in my sig, DA is keyed to 8 conditions :
- vassal and suzerain part of the same alliance
- vassalization has endured for ten years at least
- hum, sorry, your problem is that they refuse.
Well, helping factors (also presented in my FAQ

) include :
- monarch's relative DIP-skills : you could wait until they get a worse monarch, or until you get a better one. Your Edward IV is a good monarch with a base of 7, but Philip the Good has a base of 8, so you're outclassed. Wait until 1467, they'll get Charles the Bold (or the Rash if you prefer

), he's only got a 2.
- length of vassalization : chances increase the longer the vassalization has endured, up to 30 years. Waiting 5 more years will help you too
- better army : that means bigger army, and a better morale. Build your army up to maximum supportable limit, then push maintenance to 100% when you decide to try your luck - it greatly helps
- bigger economy : meaning higher income. Burgundy has some very rich provinces, and at least one CoT. Try to finish France, to get a second CoT (Ile-de-France), Mecklemburg may also help. Otherwise, that early in the game, you can't rely on colonization, nor on trade, so you'll really need to maximize your other chances. You might want to take more french provinces even if you can't finish them at once.
- getting the relations as high as possible : the closer to +200 that you can. Send them a gift a month before the attempt, to bring it to +200, and push maintenance at the same time (to avoid forgetting). It helps a little bit.
Don't wait too long tough, as in the period of 1476-1484, as soon as Burgundy is at peace and both Austria & France exist, you get 18/19 chances of losing them to some inheritance. There're three ways to avoid that doom event :
- ensuring Burgundy stays at war for the whole period : rather hard, as you need to be ready to DoW as soon as they get out of a war. Additionnally, this might ruin their economy, and cause rebels to spread out, or make them lose their wars (and provinces)
- making sure France is inexistent : that's possible, provided you started early enough, e.g. by taking some provinces in the first war (in 1419, since it's a defensive war

), and later taking again some provinces.
- making sure Austria is inexistent : as England, it's much harder, as you basically need to rely on the AI, specifically Hungary, Poland, Bohemia, Venice and/or the OE. From personal experience, I may say it's a really rare happenning.
I'd advise :
- if you can finish France, do it
- if not, try your luck with DA after 1467, and maybe even after 1472 (when vassalization will have 30 years), when they have their crappy monarch
- if both above-mentionned solutions fail, make some wars during the 1476-1484 period, preferably by DoWing far-away minors (if possible, landlocked), dropping out of war by separate war ASAP, and letting Burgundy wage that war (or let it white peace after 3 years). But you need to be ready to DoW immediately (or, safer way, make sure they're always in two different wars).