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 II (WWII or WW2), also known as the Second World War, was a global war that lasted from 1939 to 1945, though related conflicts began earlier.It involved the vast majority of the world's nations âincluding all of the great powers âeventually forming two opposing military alliances: the Allies and the Axis.he exact date of the war's end is also not universally agreed upon. It was generally accepted at the time that the war ended with the armistice of 14 August 1945 (V-J Day), rather than the formal surrender of Japan (2 September 1945).