the house's of lancaster and york

[kpp62]

what year were the house's of Lancaster and York united ?

[Octavius]

The houses of Lancaster and York were united when Henry VII married the Elizabeth of York, daughter of Edward IV.

1486

[noxlumos]

1486 is true enough in it's way,in that as modern hostorians we search for clean, clear, conclusive dates to neatly pigeonhole things so as to make our understanding better and at least that's what Lancastrian Henry VII would have liked to have happened too , but he was still plagued by varying degrees of Yorkist uprisings for many years, as simply marrying a Yorkist Princess really was not going to cut it with diehard nobles who had lost everything with the fall of Richard III. Their main problem was the lack of a sensible male figurehead and all manner of pretenders of dubious credibility were put forward (Lambert Simnel etc), but certainly contemporary evidence suggests that the country was very dsunited for many yars after Bosworth with Yorkist, Lancastrian factionality still very much to the fore. As Prince Arthur grew and the prospect of there being a first Yorkist/Lancastrian king beckoned this lessened to some degree, but it was still clearly uppermost in Henry VIIII's mind when he had the aged Lady Salisbury (Yorkist/Plantagenet heir apparent) executed some 57 years after the alleged "unification" in 1541, so the brief answer is that the houses of York and Lancaster never truly were reconciled with one another but simply a Tudor usurper was possibly the first master of spin.

[first928]

You could also say that the houses were united in 1485 when Henry defeated the last real Yorkist.