1900s

1900
February 15th, Burt Alvord, Bill Stiles, Three-fingered Jack Dunlap, George and Louis Owens, Bravo Juan Yoas, and Bob Brown attempt to rob the Wells Fargo express car at the Southern Pacific railroad depot in Fairbank, Arizona. Jeff Milton, former Texas Ranger, is the express messenger that night. Milton is wounded, but Jack Dunlap dies and Bravo Juan Yoas is wounded, while the rest of the gang make their escape without opening the safe.
July 7th, Warren Earp is killed by Johnny Boyet in a saloon in Willcox, Arizona.
November 21st, the Wild Bunch {Bill Carver, Ben Kilpatrick, Harvey 'Kid Curry' Logan, Harry 'Sundance Kid' Longabaugh, and Robert 'Butch Cassidy' Parker} have their photograph taken in a studio in Fort Worth, Texas.

1901
January 10th, Capt. A.F. Lucas brings in the 'Spindletop' oil well in Beaumont, Texas.
March 25th, the Arizona Rangers are formed.
April 26th, Tom 'Black Jack' Ketchum is hanged in Clayton, New Mexico.
June 22nd, Gregorio Cortez is captured near El Sauz, Texas.
July 18th, William 'Willie' Nickell is killed near Bosler, Wyoming, allegedly by Tom Horn.
October 29th, Annie Oakley is injured in a train wreck of the Buffalo Bill Wild West Show in Lexington, North Carolina.
December 16th, Pat Garrett is appointed collector of customs at El Paso, Texas by President Roosevelt.

1902
January 13th, Tom Horn is arrested for the murder of Willie Nickell in Cheyenne, Wyoming.
September 23rd, John Wesley Powell dies in Haven, Maine.
28th, Levi Strauss dies in San Francisco.
October 19th, James Younger commits suicide in Saint Paul, Minnesota.

1903
March 16th, Judge Roy Bean dies in Del Rio, Texas.
August 1st, Martha Jane 'Calamity Jane' Cannary dies in Terry, South Dakota.
November 20th, Tom Horn is hanged in Cheyenne, Wyoming.

1904
January 13th, Ed Kelly, killer of Bob Ford, is killed by police officer in Oklahoma City, Oklahoma.

1905
October 19th, Virgil Earp dies in Goldfield, Nevada.

1907
Date unknown, Butch Cassidy and the Sundance Kid are killed in San Vicente, Bolivia.
November 16th, Oklahoma becomes the forty-sixth state.

1908
February 29th, Pat Garrett is killed near Las Cruces, New Mexico by Wayne Brazel.

1909
February 15th, Arizona Rangers are disbanded.
17th, Geronimo dies at Fort Sill, Oklahoma.

1911
February 12th, Quanah Parker dies.

1912
January 6th, New Mexico becomes the forty-seventh state.
February 14th, Arizona becomes the forty-eighth state.
August 11th, Henry Andrew 'Heck' Thomas dies in Lawton, Oklahoma.

1913
July 14th, Gregorio Cortez is pardoned in Huntsville, Texas.

1916
March 9th, Pancho Villa invades Columbus, New Mexico.
21st, Cole Younger dies in Lee's Summit, Missouri and Gregorio Cortez dies in Anson, Jones County, Texas.

1917
January 10th, 'Buffalo Bill' Cody dies in Denver, Colorado.

1921
January 8th, William Anderson 'Devil Anse' Hatfield, of the famed Hatfield & McCoy feud, dies in Pikesville, Kentucky.
October 25th, Bat Masterson dies in New York City. (Which you can read about in my reprinted book by 'Bat' Masterson, Gunfighters of the Western Frontier, by clicking here.)

1924
November 1st, Bill Tilghman is killed by Wiley Lynn in Cromwell, Oklahoma.

1929
January 13th, Wyatt Earp dies in Los Angeles, California. He is later disinterred and reburied alongside his wife Josie in Colma, California.

1933
April 8th, Elizabeth Clift Bacon Custer {the widow of General George Armstrong Custer} dies.

1937
July 13th, Emmett Dalton dies in Los Angeles, California.

1944
Josephine Sarah Earp dies in Los Angeles, California. She is buried with her husband, Wyatt, in Colma, California.