Fought on 22 August 1485, the Lancastrians won The Battle of Bosworth

Fought on 22 August 1485, the Lancastrians won The Battle of Bosworth Field, the last significant battle of the Wars of the Roses, the civil war between the House of Lancaster and the House of York that raged across England in the latter half of the 15th century.

A. Fought on 22 August 1485, the Lancastrians won The Battle of Bosworth Field, the last significant battle of the Wars of the Roses, the civil war between the House of Lancaster and the House of York that raged across England in the latter half of the 15th century

B. Fought on 22 August 1485, The Battle of Bosworth Field- the last significant battle of the Wars of the Roses, the civil war between the House of Lancaster and the House of York that raged across England in the latter half of the 15th century- was won by the Lancastrians

C. Fought on 22 August 1485, the Lancastrians won The Battle of Bosworth Field- the last significant battle of the Wars of the Roses- the civil war between the House of Lancaster and the House of York that raged across England in the latter half of the 15th century

D. The Lancastrians won The Battle of Bosworth Field, fought on 22 August 1485, the last significant battle of the Wars of the Roses, the civil war between the House of Lancaster and the House of York that raged across England in the latter half of the 15th century

E. The Lancastrians won The Battle of Bosworth Field fought on 22 August 1485; it was the last significant battle of the Wars of the Roses- the civil war between the House of Lancaster and the House of York that raged across England in the latter half of the 15th century

I think the simplest way to look for the answer in this question would be to look the best fit for the last part of the line "the civil war between the House of Lancaster and the House of York that raged across England in the latter half of the 15th century"

In options A,B,C and D, the line "the civil war between the House of Lancaster and the House of York that raged across England in the latter half of the 15th century" is an example of run on sentence. E corrects this and separates 2 major parts of the line using ';'.

Hence, E will be the answer.