 Daniel O 'Connell led a subsequent campaign , for the repeal of the Act of Union , which failed . Later in the century , Charles Stewart <unk> and others campaigned for autonomy within the Union , or " Home Rule " . <unk> , especially those located in Ulster , were strongly opposed to Home Rule , which they thought would be dominated by Catholic interests . After several attempts to pass a Home Rule bill through parliament , it looked certain that one would finally pass in 1914 . To prevent this from happening , the Ulster Volunteers were formed in 1913 under the leadership of Edward Carson . 
