
The Battle of Bosworth Field ended the Wars of the Roses when Henry Tudor defeated Richard III. Richard was killed in the fighting, and Henry became Henry VII, founding the Tudor dynasty.
Bosworth mattered because it closed a long era of dynastic civil war in England and ushered in a new royal house that would dominate English politics for generations. Its consequences reached deep into English state formation and identity.
Reference:
TaskLoco™ — The Sticky Note GOAT