This subject was touched on briefly in a thread I started in chat The Easter Rising in Dublin in 1916 was an utter failure which was put down within a week.
Fifteen leaders, including, all seven signatories of the declaration of Irish Independence, were executed by firing squad.
What if the leaders were not executed but imprisoned? Would this have butterflied aay the Irish War of Independence? If there was no war of independence what would have happened to Home Rule?