18th » France French pilot Roland Garros (aviator) Roland Garros is shot down and glides to a landing on the Germany German side of the lines during World War I.
22nd » The use of poison gas in World War I escalates when chlorine e.g chlorine gas is released as a Chemical warfare e.g chemical weapon in the Second Battle of Ypres.
24th » The arrest of Armenian notables deported from the Ottoman capital in 1915 called 250 Armenian intellectuals and community leaders in Istanbul marks the beginning of the Armenian Genocide.
25th » World War I: The Battle of Gallipoli begins—The invasion of the Turkish Gallipoli Peninsula by Australian, British, French and New Zealand troops begins with landings at Landing at Anzac Cove called Anzac Cove and Landing at Cape Helles known as Cape Hell