Daniel O'Connell led the Repeal Association in 1840s Ireland to campaign for the repeal of the Act of Union between Ireland and Britain. While he had some success in achieving reforms earlier, the Repeal campaign struggled to gain widespread support and was ultimately ended in 1843 when a planned rally was banned. The failure of repeal was due to a lack of support from the Catholic middle class and divisions with more radical groups, as well as the united opposition of Irish and English Protestants under the strengthened Prime Minister Peel.