Francis E . Warren Francis Emroy Warren ( June 20 , 1844November 24 , 1929 ) was an American politician of the Republican Party best known for his years in the United States Senate representing Wyoming . A soldier in the Union Army during the American Civil War , he was the last veteran of that conflict to serve in the senate . Early life and military service . Warren was born on June 20 , 1844 in Hinsdale , Berkshire County , Massachusetts and grew up attending common schools and his local Hinsdale Academy . During the civil war , Warren served in the 49th Regiment , Massachusetts Volunteer Infantry as a noncommissioned officer . At the siege of Port Hudson , Warren received the Medal of Honor for battlefield gallantry , at age nineteen . His entire platoon was destroyed by Confederate bombardment and Warren , taking a serious scalp wound , disabled the artillery . Warren later served as a captain in the Massachusetts Militia . Business and politics . Following the civil war , Warren engaged in farming and stock - raising in Massachusetts before moving to Wyoming ( then part of the Territory of Dakota ) in 1868 . Settling in Cheyenne , Warren engaged in real estate , mercantile business , livestock raising and the establishment of Cheyenne ' s first lighting system , becoming quite wealthy . Warren ' s political work included : member , Wyoming Territorial Senate ( 1873 – 1874 , 1884 – 1885 ) , serving as senate president ; member , Cheyenne City Council ( 1873 – 1874 ) ; treasurer of Wyoming ( 1876 , 1879 , 1882 , 1884 ) ; and Mayor of Cheyenne ( 1885 ) . In February 1885 , Warren was appointed Governor of the Territory of Wyoming by President Chester A . Arthur , although he was removed by Democratic President Grover Cleveland in November , 1886 . He was reappointed by President Benjamin Harrison in March , 1889 , and served until 1890 , when he was elected first Governor of Wyoming ( October 11 , 1890 – November 24 , 1890 ) . Senate years and death . In November 1890 , Warren resigned as governor , having been elected to the United States Senate as a Republican , serving until March 4 , 1893 . He then resumed his former business pursuits before returning to the senate ( March 4 , 1895 – November 24 , 1929 ) . During his long senate service , Mr . Warren was chairman of the several Senate Committees : Senator Warren died on November 24 , 1929 in Washington , D . C . His funeral service was held in the United States Senate chamber . At the time of his death , Warren had served longer than any other US Senator . Legacy . F . E . Warren Air Force Base in Cheyenne , Wyoming is named after Warren . Additionally , Warren ' s daughter married then - Captain John J . Pershing in 1905 . Several years later , President Theodore Roosevelt promoted Pershing from captain to brigadier general over 900 senior officers . Pershing ' s wife and three daughters were later killed during a fire at the Presidio in San Francisco . Warren was also the first senator to hire a female staffer and , as appropriations chairman during World War I , he was instrumental in funding the American efforts . Warren and his second wife , Clara LaBarron Morgan , bought the Nagle Warren Mansion in April , 1910 , and their dining room hosted people such as Presidents Teddy Roosevelt and William Howard Taft . This mansion is now listed on the National Register of Historic Places .