If you are obese, you may also experience: 1  Trouble sleeping. 2  Sleep apnea. 3  Shortness of breath.  Varicose 1  veins. Skin problems caused by moisture that accumulates in the folds of your skin. 2  Gallstones. Osteoarthritis in weight-bearing joints, especially the  knees.
World War I as a declared state of war lasted from July 28, 1914 to November 11, 1918. After a decade of unstable alliances and military buildups, World War I was triggered in 1914 by the assassination of Archduke Ferdinand. It ended in 1919 with the Treaty of Versailles. (See related question below.)
How Long Did World War 1 Last? World War 1 started on 28th July 1914, following the assassination of Archduke Franz Ferdinand of Austria (the heir to the throne of Austria-Hungary). In response, the Austro-Hungarians declared war on Serbia and invaded. A web of alliances and treaties drew other countries into the conflict.