In American folklore, Thanksgiving is a holiday that originated in 1621 with the Pilgrims celebrating a good harvest. Some historians say that this event is poorly documented, and others believe that the Thanksgiving tradition travelled to the New World with the Pilgrims and Puritans who brought with them the English Days of Thanksgiving. Other historians think the Pilgrims associated their relief from hunger with their observance of the relief of the siege of Leiden.
The Pilgrims' Thanksgiving, if it happened, might not have been the first in the New World. Historians say the Virginia colonial charter declared a Day of Thanksgiving in 1619, and other historians say the first Thanksgiving was observed by the Spanish in Florida in 1565.
Apparently, the different English colonies and later American states each had their own day of Thanksgiving, if they had one. Abraham Lincoln tried to make Thanksgiving a national holiday in 1863, but the country was divided by the War of Northern Aggression.
Thanksgiving became a national holiday with the completion of the Reconstruction of the South after the War of Northern Aggression and the extermination of the Plains Indians by the Union generals in the 1870s. This taints Thanksgiving as a celebration of the preservation and expansion of the American Empire and accurately reflects the goal of the political forces behind Lincoln.
Today, Thanksgiving is simply known as "Turkey Day" and a time of retail sales. But as you eat your Thanksgiving meal, contemplate that what you are really celebrating is an Empire rooted in war crimes. If Lincoln had lost, and if there had been at that time a Nuremberg War Crimes Tribunal, Lincoln, Grant, Sherman, and Sheridan would have been hung as war criminals.