Millikin was born on February 12, 1891 in Hamilton, [[Ohio]]. He attended local public schools and then the [[University of Colorado]], graduating in 1913 from law school. During [[World War I]], he enlisted in the [[Colorado]] [[National Guard]] and was discharged as a [[lieutenant colonel]].
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Millikin was born on February 12, 1891 in Hamilton, [[Ohio]]. He attended local public schools and then the [[University of Colorado]], graduating in 1913 from law school. During [[World War I]], he enlisted in the [[Colorado]] [[National Guard]] and was discharged with the rank of [[Lieutenant Colonel]].