UK History: Chapter 6, Exercise 2 — Possible Solution
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TWO CORRECTIONS
1. 105,000 is the source's figure for combat deaths, an estimate whose
   derivation I did not find.
2. The wars are dated 1455 to 1487: Bosworth in 1485 ended Richard III's
   reign and began the Tudor dynasty, but the final Yorkist challenge was
   defeated at Stoke Field in 1487.

REWRITE
"The Wars of the Roses ran from 1455 to 1487, with about 105,000 combat deaths
by one source's estimate; Bosworth in 1485 established the Tudor dynasty, and
Stoke Field in 1487 ended the last Yorkist challenge."