What happened May 1915 AD

In May 1915, Mehmet Talaat Pasha requested that the cabinet and Grand Vizier Said Halim Pasha legalize a measure for the deportation of Armenians to other places due to what Talaat Pasha called "the Armenian riots and massacres, which had arisen in a number of places in the country". However, Talaat Pasha was referring specifically to events in Van and extending the implementation to the regions in which alleged "riots and massacres" would affect the security of the war zone of the Caucasus Campaign. Later, the scope of the deportation was widened in order to include the Armenians in the other provinces.

In May, Asquith agreed under parliamentary pressure to form an all-party coalition government, but the Conservatives' one condition of entry was that Churchill must be removed from the Admiralty. Churchill pleaded his case with both Asquith and Conservative leader Bonar Law, but had to accept a demotion and became Chancellor of the Duchy of Lancaster.

Beginning in 1915, the Italians under Cadorna mounted eleven offensives on the Isonzo front along the Isonzo (Soča) River, northeast of Trieste. Of this eleven offensives, five were won by Italy, three remained inconclusive, and other three were repelled by the Austro-Hungarians, who held the higher ground.

On 24 May 1915, the Triple Entente (Russian Empire, France & UK) warned the Ottoman Empire that "In view of these new crimes of Turkey against humanity and civilization, the Allied Governments announce publicly to the Sublime Porte that they will hold personally responsible for these crimes all members of the Ottoman Government, as well as those of their agents who are implicated in such massacres".

On 29 May 1915, the Committee of Union and Progress (CUP) Central Committee passed the Temporary Law of Deportation ("Tehcir Law"), giving the Ottoman government and military authorization to deport anyone it "sensed" as a threat to national security.