Lumir joined the Army in February 1945 and departed for the Asiatic-Pacific Theater with the destination of Korea. He was appointed to the Elite Guard of the 7th Division, serving duty in the Tuk Suh Palace. Lumir returned to the States in November 1946 and was discharged from the service in December 1946. He resumed farming after his return from the Army and joined Tobias American Legion Post 311. He was proud to serve as commander of the firing squad for many years.