Assistant Division Commander and, later, Commanding General, 100th Infantry Division

Like Gen. Burress, Brigadier General Andrew C. Tychsen is a veteran of 30 years' Army service. Assigned to the 100th Infantry Division as commanding officer of the 399th Infantry Regiment upon activation of the division, Brigadier General Tychsen was appointed assistant division commander in January 1945. He became Commanding General of the Century in September 1945, upon General Burress' assignment to VI Corps. He retained that post until January 1946 when the 100th was inactivated.

General Tychsen was born in Hoboken, New Jersey, on 27 June 1893. Enlisting as a private in the 1st Minnesota Infantry on April 1914, he rose through the ranks to 1st Sergeant and saw action on the Mexican border.

Leaving the First Minnesota, General Tychsen was assigned to 8th company First Reserve Officers Training Camp at Fort Snelling, Minnesota, on 25 March 1917 and was commissioned a captain in August of that year. Upon graduation, he was assigned to the 88th Division and served in the upper Alsace sector, near Belfort, as Commanding Officer of Company C, 339th Machine Gun Battalion from July 1918 to July 1919, seeing action at Belfort, Epinal, Verdun and the Meuse.

Shortly after his return to the States in 1919, General Tychsen entered the Regular Army as a captain and served in various school and command posts throughout the United States and Hawaii until World War II. In 1935 he entered the Command and General Staff School, Fort Leavenworth, Kansas, and upon graduation was assigned to the Sixth Infantry, Jefferson Barracks, Missouri. He was then placed in command of the Organized Reserves at Camden, New Jersey.