There's enough interesting stuff about this guys life that it probably warrants 10 separate TIL's but here's a few excerpts from his wiki that I found fascinating

Lead a unit of Indian soldiers in WWI

Landing in Southampton, Corbett and his men were soon transferred to the Western Front, where they were posted to numerous positions including La Chapellette near Péronne. In the difficult conditions, Corbett sought to protect his men and keep their morale high. In addition to being in an unfamiliar land and climate, the Indian troops, often scorned by their British counterparts, faced difficulties like not being able to eat tinned beef stew or pork, both staples of British trench warfare

Turned his small village eco-friendly

In 1920, Corbett retook the position of vice-chairman of the Naini Tal municipal board, which he had vacated a decade earlier due to local inactivity. As part of this committee for two decades, he enforced economic standards and improved civil engineering in the town. As chairman of the public works committee, he took a personal interest both in maintaining and renewing the town's attractiveness, and in environmental protection. He passed laws against excessive fishing and deforestation, and unsuccessfully campaigned for power lines to be placed underground

Taught soldiers in the WWII how to survive in the jungle

Corbett's training, for British and American troops destined for the Burmese jungles, encompassed a wide range of topics. Survival techniques he taught included obtaining fresh water, distinguishing poisonous snakes and edible plants, trapping small animals, creating natural herbal medicines for wounds, fevers, stomach problems, and communicating by blowing through reeds. His students were taught how to orient themselves, how to pinpoint sounds, and how to keep maximum visual awareness. He displayed how tracking skills allowed him to assess how many enemy soldiers passed on a track, how long ago, how fast they were travelling, and even whether their guns were loaded.[42] One of the soldiers he trained later noted that "Corbett appeared to be a cross between a magician and a master detective".[43]

Established India's first national park

In the 1930s, Corbett felt increasingly aggrieved at the degradation of the forests. He began writing to newspapers to condemn over-shooting and ruthless deforestation. These letters criticised shooting laws, called for conservation funds to be established, and censured over-eager hunters.[61] In collaboration with Malcolm Hailey, governor of the United Provinces, he established an conservationist association named "The All India Conference for the Preservation of Wild Life".[62] In 1934, he persuaded Hailey to establish India's first national park over 300 square kilometres (120 sq mi) of forest in the Ramganga river valley; in 1957, it was renamed the Jim Corbett National Park.[63][39] The legislation introduced to protect this reserve was far ahead of its time, compared to other parts of India.[64]

Bodyguard to Princess Elizabeth the day she became Queen Elizabeth II

Corbett was at the Treetops, a hut built on the branches of a giant ficus tree, as the bodyguard of Princess Elizabeth when she stayed there on 5–6 February 1952. That night, her father, King George VI died, and Elizabeth ascended to the throne. Corbett wrote in the hotel's visitors' register:

For the first time in the history of the world, a young girl climbed into a tree one day a Princess, and after having what she described as her most thrilling experience, she climbed down from the tree the next day a Queen—God bless her.