U.S. intervenes in World War I, rejects membership of League of Nations.
1917 · Joining the First World War
Starting with the sinking of the RMS Lusitania, which killed 128 American citizens, and many other conflicts with trade from Germany. Congress held a special meeting that resulted in The United States declaring war on Germany. Formally entering the First World War.
1923 · Oil is Discovered on the Navajo Reservation
Oil was discovered on the Navajo Reservation in the 1920's. The Navajos did not want to lease any of the land towards the exploration for oil and gas. They were soon made a deal that they would be hired for all unskilled work if they would lease the land and, reluctantly, they gave in. Albert Fall, a Senator from New Mexico and was extremely hostile towards Indian rights.
English and Scottish: from a Celtic personal name of great antiquity and obscurity. In England the personal name is now usually spelled Alan, the surname Allen; in Scotland the surname is more often Allan. Various suggestions have been put forward regarding its origin; the most plausible is that it originally meant ‘little rock’. Compare Gaelic ailín, diminutive of ail ‘rock’. The present-day frequency of the surname Allen in England and Ireland is partly accounted for by the popularity of the personal name among Breton followers of William the Conqueror, by whom it was imported first to Britain and then to Ireland. St. Alan(us) was a 5th-century bishop of Quimper, who was a cult figure in medieval Brittany. Another St. Al(l)an was a Cornish or Breton saint of the 6th century, to whom a church in Cornwall is dedicated.