How was oliver cromwell involved in charles 1 execution?

Oliver Cromwell was a key figure in the English Civil War and played a significant role in the trial and execution of King Charles I. As a leading member of the Parliamentarian forces, he opposed the king's authority and his attempts to govern without Parliament. Cromwell was a prominent supporter of the regicide, advocating for the king's trial for treason, which culminated in Charles I's execution on January 30, 1649. His actions contributed to the establishment of the Commonwealth, a republican form of government in England.