Tulsa is the second largest city in Oklahoma with a population of over 400,000. Tulsa was settled between 1828 and 1836 by the Lochapoka Band of Creek Native American tribe. For most of the 20th century, the city held the nickname "Oil Capital of the World" and played a major role as one of the most important hubs for the American oil industry. Many places claim to be the birthplace of Route 66, but Tulsa wins it. Tulsa businessman, Cyrus Avery, campaigned in 1927 to create a road linking Chicago to California by establishing the U.S. Highway 66 Association in Tulsa.