Maj. General Adna R. Chaffee, Jr.

Is your surname Chaffee?

Research the Chaffee family

Maj. General Adna R. Chaffee, Jr.'s Geni Profile

Share your family tree and photos with the people you know and love

  • Build your family tree online
  • Share photos and videos
  • Smart Matching™ technology
  • Free!


Adna Romanza Chaffee, Jr.

Birthplace: Junction City, Kansas
Death: Died in Boston, Mass, United States
Immediate Family:

Son of Lt. General Adna Chaffee, Sr. and Annie Frances Chaffee
Husband of Ethel Warren Chaffee
Brother of Kate Grace Chaffee; Mabel Chaffee and Helen Valentine Chaffee
Half brother of Unknown Chaffee and Unknown Chaffee

Managed by: Private User
Last Updated:

About Maj. General Adna R. Chaffee, Jr.

Buried in The Arlington National Cemetery in VA,_Jr.

Adna Romanza Chaffee, Jr. (September 23, 1884 – August 22, 1941) was a major general in the United States Army, called the "Father of the Armored Force" for his role in developing the U.S. Army's tank forces.

Early years

Adna Chaffee, Jr. was the son of lieutenant general Adna R. Chaffee, Sr. Born in Junction City, Kansas on September 23, 1884, he was commissioned a lieutenant of cavalry in 1906 after graduating from the United States Military Academy, and won recognition as the "Army's finest horseman."


In World War I, he was an infantry major with the IV Corps during the St. Mihiel offensive, and as a colonel, he later served with the III Corps throughout the Meuse-Argonne Offensive.

Following the war, he returned to his Regular Army rank of captain of cavalry and became an instructor at the General Staff School and the Army School of the Line at Fort Leavenworth. During the 1920s, he helped develop the armor concepts and doctrine of the future. He predicted in 1927 that mechanized armies would dominate the next war and assisted in the first program for the development of a U.S. Army armored force. Assigned to the 1st Cavalry Division in 1931, he continued to develop and experiment with armored forces, thus becoming the leading American advocate of mechanized warfare.

In 1938, he assumed command of the reorganized 7th Cavalry Brigade (Mechanized), the Army's only armored force. Chaffee battled continuously during the prewar years for suitable equipment and for establishment of armored divisions. With the collapse of the French Army in June 1940, Chaffee's 1927 predictions of the importance of armored forces in modern warfare were confirmed.

Chaffee died of cancer on August 22, 1941 in Boston, Massachusetts.


The M24 Chaffee light tank was later named for him.

Fort Chaffee, Arkansas, near Fort Smith, Arkansas, was named in his honor.

view all

Maj. General Adna R. Chaffee, Jr.'s Timeline

September 23, 1884
Junction City, Kansas
December 15, 1908
Age 24
Fort Riley, Kansas
August 22, 1941
Age 56
Boston, Mass, United States