He served in World War I (as a part of the Medical Reserve Corps) as commanding officer of 366th Ambulance Company in the 317th Sanitary Train.

[3] When Brown answered the military's call for physicians he was immediately given the rank, First Lieutenant in the Army Medical Reserve Corps.

[4] Brown was in charge of reporting the conditions of the field and proposing means of improving evacuation and first aid techniques.

[5] At the conclusion of the war, Captain Brown was honorably discharged and he returned to Laurel to continue his work.

Brown returned to laurel and became very involved in civic programs and did frequent work with the local businessman.