Who was responsible for forming a Parliament in 1265?

The correct answer is Simon de Montfort. He is credited with forming the first English Parliament in 1265. This was a significant event in British history as it represented a shift towards a more inclusive political system. De Montfort organized a Parliament that included not just nobles, but also commoners, which was a major step towards the establishment of representative democracy in England.

This development came during a turbulent period in England's history, marked by conflicts between the monarchy and the barons. De Montfort, a notable baron himself, sought to address the grievances of both the nobility and the common people, leading to greater political participation.

While King John, Richard III, and King Henry II were all important figures in English history, they were not involved in the formation of Parliament in 1265. King John is known for signing the Magna Carta in 1215, which laid down some principles of law and governance, but he did not establish a Parliament. Richard III, who reigned much later in the 15th century, and King Henry II, who ruled in the 12th century, were also not associated with this particular milestone in the development of the English parliamentary system.