 Daniel O 'Connell led a subsequent campaign , for the repeal of the Act of Union , which failed . Later in the century , Charles Stewart Parnell and others campaigned for autonomy within the Union , or " Home Rule " . Unionists , 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 . 
 Daniel O 'Connell led a subsequent campaign , for the repeal of the Act of Union , which failed . Later in the century , Charles Stewart Parnell and others campaigned for autonomy within the Union , or " Home Rule " . Unionists , especially those located in Ulster , <a href='uninflect' title='1'><mark>were</mark></a> 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 <a href='uninflect' title='2'><mark>were</mark></a> formed in 1913 under the leadership of Edward Carson . 
Daniel O 'Connell led a subsequent campaign , fa da repeal of tdaAct of Union , which failed . Later in thdaentury , Charles Stewart Parnell and others campaigned ffaautonomy within thedaion , or " Home Rule " . Unionists , especially those located in Ulster , was strongly opposed to Home Rule , which they thought would b 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 dis from happenin , the dater Volunteers was formed in 1913 under the ldaership of Edward Carson .