Congressman William Harrison Martin took offense to articles Harries had written about him, and responded by attacking him in the United States Capitol.

[7] As a reporter, Harries covered the Wounded Knee campaign for the Star, and he later advanced to editorial writer, then associate editor.

[5] In 1895, Harries left journalism for a career in business when he was appointed president of Washington's Metropolitan Street Railway Company.

[5] The company had a reputation for poor service and was experiencing a prolonged labor strike when Harries took over, and within two years he had succeeded in restoring it to profitability.

[5] The Byllesby company was an engineering and management consulting firm with utility and transportation interests in more than 100 cities and towns throughout the United States.

[10] He served in staff positions with the organization's brigade headquarters including inspector of rifle practice, and advanced to the rank of major.

[2] Base Section Number 5 and the Port of Brest was the main point of debarkation for Allied troops and equipment arriving in France.

[20][21] Following the armistice of November 11, 1918, Harries took part in the occupation of Germany as Chief of the U.S. Military Mission in Berlin, which he led until December 1920.

[23] After Harries demanded an end to the practice, the German government began taking steps to ensure the safety of Russians who had been held as POWs.

[25] He was subsequently promoted to major general in the Auxiliary Officer Reserve Corps, and he served until reaching the mandatory retirement age of 64 in 1924.

[17][27] The Byllesby company formed its own post-World War I American Legion post, of which Harries was elected commander.

5, General Harries successfully directed the manifold activities at the Port of Brest during the time when troop arrivals were at their maximum.

Subsequently, upon being sent on a special mission to Berlin in connection with the repatriation of allied prisoners of war, he displayed commendable tact and energy.

[20] In retirement, Harries was a fellow of the American Institute of Electrical Engineers[33] and resided in Bel Air, Los Angeles, California.

[2] Warren Harries died in a car accident in France while he was serving as his father's aide de camp during World War I.