On June 28, 1914, Archduke Franz Ferdinand survived a bomb plot in Sarajevo. In our timeline, the assassins had a second chance to kill the heir apparent when his car took a wrong turn near conspirator Gavrilo Princip. In this timeline, Franz Ferdinand's car turned left onto Franz Josef Street, denying Princip the opportunity to carry out the plot.
Without the assassination of Archduke Franz Ferdinand, World War I and II never occur.
December 1914: Irish Home Rule comes into effect. All of Ireland is placed under a single devolved Parliament at Dublin.
November 21, 1916: Archduke Franz Ferdinand succeeds his uncle Franz Josef I as Emperor of Austria and Apostolic King of Hungary. Upon acceding the throne, he promises the people of Bosnia and Herzegovina a referendum on independence.
June 1916: Encouraged by Ottoman Army officer Muhammed Sharif al-Faruqi and the Emirate of Nejd and Hasa, the Grand Sharif of Mecca revolts against Ottoman rule. The Ottoman Empire sends Colonel Mustafa Kemal Bey to put down the revolt and conquer the remainder of the Arabian Peninsula.
January 1917: Colonel Mustafa Kemal Bey succeeds in seizing Riyadh, the capital of the Emirate of Nejd and Hasa. Kemal orders the execution of all members of the House of Saud. The Ottoman Empire begins military occupation of all the Arabian Peninsula. Kemal becomes the last Grand Vizier, and first Prime Minister, of the Ottoman Empire. October 1917: Tsarevich Alexei dies after falling from a horse.
More coming soon.