[1][2][3] Among his classmates included several general officers of the future, such as Charles Gerhardt, Ulysses G. McAlexander, Ernest Hinds, Nathaniel Fish McClure, Michael Joseph Lenihan, Charles S. Farnsworth, James Theodore Dean, Mark L. Hersey, Herman Hall, Frank Herman Albright, Marcus Daniel Cronin, George Owen Squier, Thomas Grafton Hanson, George Washington Gatchell, Alexander Lucian Dade and Edmund Wittenmyer.

In September 1893, he and his regiment were transferred to Whipple Barracks near Prescott, Arizona, where he led a company of Apache Indian scouts.

He later served as aide-de-camp to Brigadier General Alexander Pennington, and also established what was to become Camp Wikoff at Montauk Point, New York.

[6] On August 5, 1917, Weigel was appointed a brigadier general in the National Army and given command of the 151st Depot Brigade, a part of the 76th Division stationed at Camp Devens, Massachusetts.

[6] With the war now over due to the Armistice with Germany, the division remained in France through May 1919 before returning to the United States, where it was demobilized in June.

[2][12][13] Weigel returned to his Regular Army rank of colonel on June 15, 1919, commanding the 17th Infantry Regiment at Camp Meade, Maryland, to August 22 when he began serving as chief of staff for the Second Corps Area at Governor's Island.

In March 1927 he returned to the United States and served as head of public relations for the army in the headquarters of the Second Corps Area until his retirement on August 25, 1927.