This is an old song my father and I used to sing together, randomly. These 'official' lyrics are taken from a folk song web page: http://ingeb.org/home.html, which has a lot of different stuff. The lyrics in the song refer to some Irish historical figures and myths that don't appear on Everything yet, but I hope to fill those holes soon.

Michael Joseph McCann, 1843

Proudly the note of the trumpet is sounding
Loudly the war-cries arise on the gale
Fleetly the steed by Lough Sweighly is bounding
To join the six squadrons on Saimier's green vale!
On every mountaineer! Strangers to flight or fear!
Rush to the standard of dauntless Red Hugh!
Bonnaught and gallowglass, throng from each mountain pass!
Onward for Erin! O'Donnell Abu!

Princely O'Neill to our aid is advancing
With many a chieftain and warrior clan!
A thousand proud steeds in his vanguard are prancing
'Neath the Borderers brave from the banks of the Ban!
Many a heart shall quail under his coat-of-mail,
Deeply the merciless foeman shall rue
When on his ear shall ring, borne on the breeze's wing
Tyr Connell's dread war cry: O'Donnell Abu!

Wily O'Desmond the war-wolf is howling
Fearless the eagle sweeps over the plain;
The fox in the streets of the city is prowling
And all who would conquer them are banished or slain!
On with O'Donnell then! Fight the good fight again!
Sons of Tyr Connell are valiant and true!
Make the proud Saxon feel Erin's avenging steel!
Strike for your country, O'Donnell Abu!