Columbia subject headings:
Ireland--History--1910-1921.
Ireland--History--Autonomy and independence movements.
Ireland--History--Civil War, 1922-1923.
Irish Republican Army--History.
Irish question.
Harvard subject headings:
British--Ireland--History--20th century.
Guerrilla warfare--Ireland--History--20th century.
Ireland--History--1910-1921.
Ireland--History--Civil War, 1922-1923.
Ireland--History--Easter Rising, 1916.
Ireland--History--Partition, 1921.
Irish Republican Army--History.
Irish question.
Political violence--Ireland--History--20th century
Princeton subject headings:
British--Ireland--History--20th century.
Guerrilla warfare--Ireland--History--20th century.
Ireland--History--1910-1921.
Ireland--History--Easter Rising, 1916.
Ireland--History--Partition, 1921.
Irish Republican Army--History.
Irish question.
Political violence--Ireland--History--20th century.