In 1871 Bothmer joined the Bavarian Army. He spent the next forty years serving in the Bavarian War Ministry or on the Royal Bavarian Army General Staff, with three years in Berlin with the Prussian General Staff. During this time he rose through the ranks, reaching General der Infanterie in 1910. On 30 November 1914 he was appointed to command the 6th Bavarian Reserve Division at Ypres. On 22 March 1915 he was given the command of Corps Bothmer, a unit raised to help defend the passes of the Carpathian Mountains against Russian attacks that directly threatened Hungary. He won the Battle of Zwinin which took place from 5 February – 9 April 1915, and was thus in the right place to take part in the great German advance after the breakthrough during the Gorlice–Tarnów Offensive in May 1915. After 6 July 1915, Hans Ritter von Hemmer was his Chief of General Staff. On 7 July, he was awarded the Pour le Mérite for outstanding leadership and distinguished military planning and successful operations during the battles of Dniester, Gnila-Lipa, and Zlota-Lipa. He was awarded Oakleaves on 25 July 1917 for his actions during the battle around the city of Brzezany during the German summer offensive on the eastern front, as well as for his outstanding leadership and organization during the battle at the bridgehead at Zbrucz. He received the Grand Cross of the Bavarian Military Order of Max Joseph. His units stood firm against the Brusilov Offensive of June 1916. In 1917, he was appointed to command the 19th Army in Lorraine. He remained there until 8 November 1918, while to the north the German front crumbled. Bothmer retired from the army in November 1918. Bothmer’s last job in the army, again along with von Hemmer, was as an adviser for the Bavarian Ministry for Military Affairs from November to December 1918, mostly overseeing the demobilization of the soon-to-be-disbanded Bavarian Army. Count Bothmer died in Munich on March 18, 1937 and, contrary to his family's wishes, Adolf Hitler's government ordered a state funeral. He was eulogized by Prince Rupprecht of Bavaria.
Family
Bothmer's father was an army general and belonged to the German nobility. Felix Graf von Bothmer married Auguste Baldinger on July 22, 1882. They had 2 daughters together.
Military ranks
Leutnant: November 28, 1871
Oberleutnant: November 23, 1882
Hauptmann: October 31, 1888
Major: September 22, 1893
Oberstleutnant: March 17, 1897
Oberst: July 21, 1900
Generalmajor: May 18, 1903
Generalleutnant: September 15, 1905
General der Infanterie: May 4, 1910
Generaloberst: April 9, 1918
Decorations and honors
Bavaria
Military Order of Max Joseph, Knight's Cross, Commander's Cross and Grand Cross
Military Merit Order, 1st Class, Swords to 1st Class and Grand Cross with Swords