Poe enrolled at Princeton University in the fall of 1891, and was elected president of the freshman class. In spite of his small size, he made the varsity football team at halfback, and finished the season tied for third in touchdowns scored for the team. However, he struggled academically, and was asked to leave in the Spring. When he left for home, the entire freshman class escorted him to the train station. He re-enrolled the following Fall, and started at quarterback, moving to halfback midway through the season. Poe played even better than in his freshman year, finishing second on the team for touchdowns scored. However, he was once again forced to leave the university for scholastic reasons. After leaving Princeton, Poe bounced around, coaching two seasons at Virginia, working for a steamboat operator, selling real estate, coaching the Navy football team, and serving as an assistant coach at Princeton. Poe would often return to Princeton as an assistant coach, including the National Championship season of 1903. It was while serving as an assistant coach that Poe is credited with saying "If you won't be beat, you can't be beat," which became the team motto for many seasons.
Soldier, adventurer
Poe enlisted in the Fifth Maryland Infantry Regiment, and after over three years had risen to the rank of corporal, when the United States declared war on Spain on 25 April 1898. His regiment was mustered into Federal service on 14 May, and sent to Tampa, Florida, on 3 June, in preparation for an invasion of Cuba. However, the regiment was unable to obtain transport to Cuba, and spent the war in Tampa, and later in Huntsville, Alabama, before being mustered out of service on 22 October,. Poe worked as a cowpuncher in New Mexico, but longed for action and enlisted in the Regular Army's 23rd Infantry. He was sent to the island of Sulu in the Philippines, where he served in Company F and as an orderly on General Bates' staff, seeing none of the action he had been hoping for. Declining to apply for a commission, Poe instead asked his father to buy out his enlistment, and worked as a surveyor in Baltimore for a few months before returning to New Mexico. In 1903, Poe joined the Kentucky National Guard, his detachment of which was sent to Princeton, Kentucky, to suppress uprisings which led to the "Black Patch Wars". Later that year, he wrote to the Commandant of the Marine Corps, volunteering his services in the looming Panamanian revolution. He was enlisted and sailed for Panama aboard the, but saw no action, and he returned to the United States. There, he engaged briefly in the coal-mining business in Charleston, West Virginia, before moving to Tonopah, Nevada, to engage in silver mining there. Hearing that war was breaking out between Honduras and Nicaragua, Poe left Nevada in 1907, intending to join the Nicaraguan army. However, when his ship reached Honduras, anxious that the war was ending, he joined the army of Honduras. He was made a captain and put in charge of a gun in the siege of Amapala. The war ended with the defeat of Honduran forces, and Poe returned to Nevada and mining. The following year found him with General Rafael de Nogales Méndez on a filibustering expedition in Venezuela against the dictator, Cipriano Castro. Méndez eventually ran afoul of the new president, Juan Vicente Gómez, and went into exile. Poe returned once again to his mining interest, taking a two-year break, however, to join an expedition to survey the boundary between Alaska and Canada.
Death
Within days of Britain's entry into World War I, Poe volunteered for the British Army and was assigned to the Royal Garrison Artillery, where he served in France for the remainder of 1914 and the first part of 1915. By then he had decided that artillery was too far behind the lines, and had himself transferred to the Black Watch, a famous Scottish infantry regiment, known to the Germans as the "Ladies from Hell" for the kilts they wore and their ferocity. In the opening hours of the Battle of Loos, on the morning of 25 September 1915, Poe was with a detachment carrying bombs to another regiment and was part way across an open field, when he was struck in the stomach by a bullet and killed. He was later buried there, between the German and British lines. However, his friends and relatives were never able to locate his grave.
Legacy
Poe's name was entered into the Black Watch roll of honor at Edinburgh Castle. At Princeton, Poe field was named in his honor. Given annually and established by Poe's mother, the "John Prentiss Poe, Jr. Memorial Football Cup" is the highest award given to a Princeton football player.
