[1] Mac Artáin initially appeared to be hesitant to engage in growing tension between the native Gaelic gentry and the English colonial lords.
As the war progressed Mac Artáin appears to have been on active campaign with the confederate forces, destroying lands in Munster that were in the possession of the Earl of Kildare.
Mac Artáin is recorded as having been present at the Battle of Kinsale in 1601, where the confederate forces and their Spanish allies were soundly defeated.
Many of Eachmilidh's descendants appear to have become Wild Geese, serving in the Irish Brigades of the Spanish and French armies for the next century.
His descendants include: Cynthia Roche, Theophilus Macartan, Anne de Gaulle, Frances Shand Kydd, Jo Berry, Maurice Roche, Charles DeGaulle, Diana Spencer, Jane Fellowes, Edmond Roche, Cornelius Curtain, Cynthia Cary Van Pelt Russell, William Mountbatten, Green McCurtain, Florimond-Benjamin MacCurtain, Frank Forde, Jean de Gaulle, Oliver Platt, Karen McCurtain-Blair, Charles Spencer, Colm Feore, William Curtain, William Brownlow Forde, Thomas Robins, Evan Thomas, Edmond Roche, James Roche, Lady Sarah McCorquodale, Philippe de Gaulle, Michael McCartan, Henry Mountbatten, Charles de Gaulle II, Ryan McCartan, Shay McCartan, Edward McCartan, Arthur Guinness, and Mathew Forde.