January 13th Edit
World war 1 started with the assassination of Franz Ferdinand of Austria-Hungry. His death was at the hands of Gavrilo Princip a serbian nationalist secretive military group known as Black Hand-propelled major European military powers towards war.
World war 2 started by Germany in an unprovoked attack on Poland. It contained many of the world's countries. Europe began on 3rd September 1939 when Prime Minister of Britain, Neville Chamberlain.
5 places war could start this year Korean Peninsula, cyberspace, Syria, South Asia, and Baltic Sea.