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.)
World War I Articles. World War I summary: The war fought between July 28, 1914, and November 11, 1918, was known at the time as the Great War, the War to End War, and (in the United States) the European War. Only when the world went to war again in the 1930s and â40s did the earlier conflict become known as the First World War.