Jules Gaucher was a French Army officer noted for his command of Foreign Legion troops in Indochina. Described as a "burly, hard-drinking veteran of years of jungle fighting, with a nose like an axe-blade and a mouth like its cut", Gaucher was a popular commander among the Legion, known as 'the Old Man' to his troops. He was killed at the Battle of Dien Bien Phu in 1954.
Gaucher was appointed to command of 3rd battalion of 13th demi-brigade in 1949 and returned to Indochina at the head of his battalion in 1950 as part of the French Far East Expeditionary Corps to participate in the First Indochina War. Under his command, III/13e DBLE served throughout Indochina – notably in the Delta and at the Battle of Hòa Bình. In 1951 he was promoted to Lieutenant-colonel and asked to remain in Indochina with 13e DBLE instead of accepting command elsewhere. He served as second-in-command of 13e DBLE from 1951 to 1953, until in 1953 he was appointed as commander of 13e DBLE. He had the reputation of a tough and hard-drinking soldier.
Dien Bien Phu 1953–54
Gaucher was appointed to command of Groupe Mobile 9 during the Battle of Dien Bien Phu. The group comprised three infantry battalions, the I/13e DBLE, III/13e DBLE, and III/3e RTA, and one artillery battery. Stationed at the collection of strong points known as Béatrice to the northeast of the main base, Gaucher showed visitors that his men had cleared brambles and thickets to establish clear fields of fire and he expressed confidence in the formidable French defenses. By the beginning of March, Gaucher's men at Béatrice were taking casualties while on patrol, losing six officers in addition to the enlisted men. On March 13, 1954, Gaucher made rounds among his men, pointing out weaknesses in defensive works and ordering final preparations for the attack he was confident would come that night. He told his men that Béatrice, overlooking the road and exposed on the northeastern edge of the French base, was "the little goat that the tiger eats for breakfast." During the attack that indeed came that night, Gaucher's command post was hit by artillery fire. Suffering from serious wounds – the loss of both arms, severe injuries to both legs, and an open chest wound – he died at the hospital. His command of the base's central sub-sector was passed on to Lieutenant-colonel Pierre Langlais.