Well, I'll say this for them, even though they wear no military uniforms, they march more smartly then many who do. & I have no interest in discussing N. Ireland politics or Irish politics & history in general, so no one even try engaging me on those points.
Oh the irish Republic and irish volunteers were already way underway, see Home Rule and the Irish Republican Brotherhood. Absolutely nothing silly considering the men being commemorated ensured we live in the UK and not under a Roman Catholic Church controlled Nationalist Republic