For "Back Home In Derry" and "Fields Of Athenry":

The transportation of convicts to Australia which took place from 1778 until 1868 was extremely well documented. After the sailing of the "First Convoy" in 1778 from Spithead off Portsmouth, each sailing to land convicts ashore in Australia and Tasmania is documented. No convict ships sailed from Galway (nearest seaport to Athenry) or from Derry. No convict ships sailed at all from Ireland in 1803, the only ship to sail that year was the "Coromandel" out of England. After the first three convoys, you stood a better chance of surviving the voyage to Australia as a convict as Masters were only paid for each convict that reached his destination alive, so every convict ship carried a doctor, overall losses (Some 160,000+ transported) were minimal.

For "The Band Played Waltzing Matilda" - The young man would not have been given a tin hat on joining up in Australia in 1915, British and Empire Forces were not issued with tin hats until 1916. No-one was killed at all during the landings at Suvla Bay as the landings were unopposed.