In 1912 some people in Parliament tried again to get Home Rule. About 500,000 Unionists in Ulster signed a petition against Home Rule called the Ulster Convenant. They also formed an army called the Ulster Volunteers. Irish Nationalists formed an army called the Irish Volunteers. By 1914, the government was too worried about World War I to think about Home Rule. Both Nationalists and Unionists fought in British military units in World War I.