Green grass that covers nearly every lawn in America is not native to the Americas. The Europeans brought it over when they settled and it slowly dominated prairie grass.
Life in Puritan New England was so hard that children who were abducted by Native Americans often refused to come back. The Indians freed children of the work obligations they faced in the colonies — boys hunted, caught fish, and gathered nuts; and girls cultivated corn but had no master “to oversee or drive us, so that we could work as leisurely as we pleased.”
In the Cold War, the United States spent millions of dollars to supply Afghan schoolchildren with textbooks filled with violent images and militant Islamic teachings, in order to spur resistance to the Soviet occupation.
Brushing one’s teeth wasn’t popular in America until after World War II, when soldiers, ordered to brush teeth, brought home their enforced habit.
The US and the USSR’s only direct military confrontation happened in October 1944, over the Serbian town of Niš. It is considered top secret by both governments, and the exact number of casualties is unknown.
During WWII the United States asked Mexicans to cross the border to work agricultural jobs.
In 1970 the US Postal Service decided on a strike after a Congressional decision to raise the wages of postal workers by only 4%, at the same time as Congress raised its own pay by 41%.
In 1879 a Native American had to sue the United States Government to prove that he was legally a person.
U.S. President James Buchanan regularly bought slaves in Washington, D.C. and quietly freed them in Pennsylvania.