Background: Philip Henry Sheridan (March 6, 1831 - August 5, 1888) was a career United States Army officer and a Union general in the American Civil War. His career was noted for his rapid rise to major general and his close association with General-in-chief Ulysses S. Grant, who transferred Sheridan from command of an infantry division in the Western Theater to lead the Cavalry Corps of the Army of the Potomac in the East. In 1864, he defeated Confederate forces in the Shenandoah Valley and his destruction of the economic infrastructure of the Valley, called "The Burning" by residents, was one of the first uses of scorched earth tactics in the war. In 1865, his cavalry pursued Gen. Robert E. Lee and was instrumental in forcing his surrender at Appomattox.
Context: Sheridan was promoted to lieutenant general on March 4, 1869. In 1870, President Grant, at Sheridan's request, sent him to observe and report on the Franco-Prussian War. As a guest of the King of Prussia, he was present when Napoleon III surrendered to the Germans, which was gratifying to Sheridan following his experiences with the French in Mexico. He later toured most of Europe and returned to the U.S. to report to Grant that although the Prussians were "very good brave fellows [who] had gone into each battle with the determination to win, ... there is nothing to be learned here professionally." He criticized their handling of cavalry and likened their practices to the manner in which Meade had attempted to supervise him. However he referred to theirs as a "perfect military system" and had a high opinion of the officer corps. His words on the French were much more harsh; he criticized the French army for not taking numerous opportunities to halt the German advance, for advancing slow and clumsily themselves, for not taking any of the numerous good opportunities to cut the enemy's unguarded lines of communication, and for routing frequently. He remarked: "I am disgusted; all my boyhood's fancies of the soldiers of the great Napoleon have been dissipated, or else the soldiers of the "Little Corporal" have lost their elan in the pampered parade soldiers of the 'Man of Destiny'."  In 1871, Sheridan was present in Chicago during the Great Chicago Fire and coordinated military relief efforts. The mayor, Roswell B. Mason, to calm the panic, placed the city under martial law, and issued a proclamation putting Sheridan in charge. As there were no widespread disturbances, martial law was lifted within a few days. Although Sheridan's personal residence was spared, all of his professional and personal papers were destroyed. When Chicago's Washington Park Race Track organized the American Derby in 1883 he served as its first president.  Sheridan served as commander in chief of the Military Order of the Loyal Legion of the United States (MOLLUS) veterans' organization from 1886 to 1888. He was also the first president of the Society of the Army of the Potomac when it was founded in 1869.  On November 1, 1883, Sheridan succeeded General William T. Sherman as Commanding General of the U.S. Army, and held that position until his death. He was promoted on June 1, 1888, shortly before his death, to the rank of General in the Regular Army (the rank was titled "General of the Army of the United States", by Act of Congress June 1, 1888, the same rank held earlier by Grant and Sherman, which is equivalent to a five-star general, O-11, in the modern U.S. Army).
Question: what else did he do
Answer: He was also the first president of the Society of the Army of the Potomac

Background: Johann Christian Friedrich Holderlin (German: ['jo:han 'kRIsti.a:n 'fRi:
Context: After obtaining his magister degree in 1793, his mother expected him to enter the ministry. However, Holderlin found no satisfaction in the prevailing Protestant theology, and worked instead as a private tutor. In 1794, he met Friedrich Schiller and Johann Wolfgang Goethe and began writing his epistolary novel Hyperion. In 1795 he enrolled for a while at the University of Jena where he attended Johann Gottlieb Fichte's classes and met Novalis.  There is a seminal manuscript, dated 1797, now known as the Das alteste Systemprogramm des deutschen Idealismus ("The Oldest Systematic Program of German Idealism"). Although the document is in Hegel's handwriting, it is thought to have been written by either Hegel, Schelling, Holderlin, or an unknown fourth person.  As a tutor in Frankfurt am Main from 1796 to 1798 he fell in love with Susette Gontard, the wife of his employer, the banker Jakob Gontard. The feeling was mutual, and this relationship became the most important in Holderlin's life. After a while, their affair was discovered, and Holderlin was harshly dismissed. He then lived in Homburg from 1798 to 1800, meeting Susette in secret once a month and attempting to establish himself as a poet, but his life was plagued by financed worries and had to accept a small allowance from his mother. His mandated separation from Susette Gontard also worsened Holderlin's doubts about himself and his value as a poet; he wished to transform German culture but did not have the influence he needed. From 1797 to 1800, he produced three versions--all unfinished--of a tragedy in the Greek manner, The Death of Empedocles, and composed odes in the vein of the Ancient Greeks Alcaeus and Asclepiades of Samos.
Question: Did he switch careers?
Answer:
attempting to establish himself as a poet,