1. On December 11, 1907, Oklahoma was officially admitted as the 46th state of the United States. This followed years of territorial status and a constitutional convention held in Guthrie.

2. In 1918, on December 11, an Oklahoma soldier named Alvin York became a hero during World War I by single-handedly taking out a German machine gun nest and capturing 132 enemy soldiers. He later received the Medal of Honor for his bravery.

3. The Oklahoma Indian Welfare Act was signed into law on December 11, 1936. This legislation ended the policy of forced assimilation of Native Americans and allowed tribes to establish their own governments and preserve their cultures.

4. In 1985, on December 11, the "Mayflower Congregational Church v. City of Oklahoma City" case was decided by the Supreme Court. The ruling held that the city's attempt to restrict the church's use of its property, which included providing food and shelter to the homeless, violated the First Amendment's protection of religious freedom.

5. On December 11, 2012, the Oklahoma Supreme Court struck down a law that required women seeking an abortion to have an ultrasound and listen to a detailed description of the fetus before the procedure. The court found that the law was unconstitutional and violated women's privacy rights.