Following the unification of most of Italy, tensions between the royalists and republicans erupted. In April 1861, Garibaldi entered the Italian parliament and challenged Cavour's leadership of the government, accusing him of dividing Italy and spoke of the threat of civil war between the Kingdom in the North and Garibaldi's forces in the South. On 6 June 1861, the Kingdom's strongman Cavour died. During the ensuing political instability, Garibaldi and the republicans became increasingly revolutionary in tone. Garibaldi's arrest in 1862 set off worldwide controversy.