Scathach - the female warrior who trained Cu Chulainn.

Brendan “Paddy” Finucane - WWII Fighter Ace, youngest RAF Wing Commander in history
Edward “Mick” Mannock VC - WWI Flying Ace

Thomas Francis Meagher


Saint Patrick's Battalion - Mexico/Mexican - American war
Wild Geese - General Terry arrived in France in 1693, became a general and ended up in Jerez in Andalusia (Spain) where he discovered the local drink "sherry". He used Irish agricultural methods to improve the farming. He laid the foundations for the area to become the most important sherry producing spot in Spain. The Terry Corporation is today the second largest sherry exporter in Spain. He also bred the local horses in his estate and he gave some as a present to Archduke Charles of Vienna, Austria who started the famous Spanish Riding school with the horses that he renamed Lipezaners.
Irish Brigade (France) Major Dan O Mahony in 1702 during the battle of Cremona, he and his men held off the suprise night time attack from the Austrians without wearing any trousers and then sent them out of the city.
The Battle of Fontenoy (1744), the only major engagement when all the Irish Regiments were used in the field. They were kept in reserve and let loose when the English were gaining the upper hand. They were eventually sent against the Coldstream Guards and forced them back, turning the tide of the battle around. When George 11 heard the news he muttered " Accursed the laws which deprive me of such subjects".
Robert Henessy started exporting a brandy after he retired from the Irish Brigade.
During WW1, Commandant O Byrne conducted a daring submarine raid on the austro-hungarian naval base at Pula along the Adriatic coast at Croatia.
The Galloping Hogan - Portugal - He held the rear guard after the Battle of the Boyne in 1690 and attacked the English forces in Limerick at night, thus allowing the treaty to come into play. He joined the Irish Brigade in France, fought in battles at Flanders but had to resign after a duel with another Irishman. The king suggested that he go to Portugal where King Joao could use him. He used his guerrilla tactics and night time horse raids to good effect here too.He lead a brigade of Portuguese soldiers which held off an invading Spanish force.
Irish Brigade - Spanish Civil War (Facist)
Connelly Column - Spanish Civil War (Republican)
Irish Commandos (Transvaal Bridgades) - Second Boer War (Boer)

The King (need to research his name) of the Dal Riada from Northern Ireland who were the Scotti tribe that became the Picts in Scotland.

Edward Bansfield ( born 1783) from Cork was the first European to sight Antarctica.
Robert McClure (born 1807) from Wexford discovered the Northwest Passage. McClure Straight is named after him

Lucy Fitzgerald organized the wives, mothers and daughters into the Company of Santa Barbara in Gerona, Spain when Napoleon invaded. Under heavy fire the company evacuated the injured, passed ammunition and took the places of injured soldiers. The company became a model for other regiments to form their own nursing auxillary organisations.

Tomas Geraldino Fitzgerald (Irish descent) invented a desalinization method for filtering seawater for the Spanish Navy in 1790

Peter de Lacy, one of the Wild Geese. He served with the Irish Brigade in France, then moved to Poland where he met Czar Peter the Great of Russia. He went to Russia to train the army in modern European warfare. The army were not impressed with de Lacy so he only managed a battalion of nobles - the Grand Musketeers. This battallion eventually defeated the Swedish army and the russians began to take notice of De Lacy now that he was a field marshall