Platt Amendment, an enactment of the U.S. Congress in 1901 defining relations with Cuba, then under United States occupation following the Spanish-American War. The amendment limited Cuba's independence and gave the United States the right to intervene to ensure stable government. Under pressure by the United States, the Cubans incorporated the amendment's provisions in their constitution of 1901. Cubans resented the amendment, and it was withdrawn in 1934. The amendment, attached to an army appropriations bill, was introduced by Senator Orville H. Platt (1827–1905) of Connecticut.
In prehistoric times Ohio was the home of Indians known as Mound Builders. When the French first settled in Canada in the early 17th century, the Erie Indians were living south of Lake Erie, but in mid-century they were conquered and dispersed by the Iroquois.
At least 10,000 years ago, prehistoric people came to what is now Illinois. Archeological excavations at the Koster Site in the lower Illinois River valley have revealed evidence of almost continuous habitation there by advanced Indian cultures from about 8000 B.C.