Kinnick left law school after one year and enlisted in the Naval Air Reserve. After completing a speaking tour of Iowa communities and visiting his parents in Omaha, he reported for induction three days before the attack on Pearl Harbor. He wrote, "There is no reason in the world why we shouldn't fight for the preservation of a chance to live freely, no reason why we shouldn't suffer to uphold that which we want to endure. May God give me the courage to do my duty and not falter." Later, he added, "Every man whom I've admired in history has willingly and courageously served in his country's armed forces in times of danger. It is not only a duty but an honor to follow their example the best I know how. May God give me the courage and ability to so conduct myself in every situation that my country, my family, and my friends will be proud of me."