Who helped Oliver Cromwell succeed?

Oliver Cromwell's success was supported by several key figures and groups, notably the New Model Army, which he helped organize and lead during the English Civil War. His military acumen and leadership were bolstered by allies such as Henry Ireton and other parliamentary leaders. Additionally, the growing discontent with King Charles I among Parliamentarians and the populace played a crucial role in Cromwell's rise to power, as they rallied behind his vision for a republic.