It was a little sooner, but the first stable French Republic was created after losing the war against Prussia in 1870. Curiously, royalists had the majority in

It was a little sooner, but the first stable French Republic was created after losing the war against Prussia in 1870. Curiously, royalists had the majority in the first parliament but didn't manage to agree on a king, they lose the next election and then monarchists rapidly disappeared from France politics. So 3 revolutions (1789/1830/1848) fail to create a republic but losing a war manage to do it.