Who was the military officer who arrived in 1610 to turn the fortunes of the jamestown colony?

Who was the military officer who arrived in 1610 to turn the fortunes of the jamestown colony?
Captain John Smith, based on an engraving done in 1616.

John Smith Map of 1616 (colorized by Preservation Virginia).

Captain John Smith was an adventurer, soldier, explorer and author. Through the telling of his early life, we can trace the developments of a man who became a dominate force in the eventual success of Jamestown and the establishment of its legacy as the first permanent English settlement in North America.

John Smith was baptized on January 9, 1580, at Saint Helena's Church in Willoughby, Lincolnshire, England. His parents were George and Alice Smith. George was a yeoman farmer who owned land in Lincolnshire and also rented land from Lord Willoughby, his landlord and relation by marriage.

As a young boy, John attended local grammar schools learning reading, writing, arithmetic, and Latin. Not wanting to be a farmer, John ran away at age 13 to become a sailor, but his father stopped him, making John work as an apprentice [a person who works for another in order to learn that trade] to a nearby merchant. In 1596, following the death of his father, John sailed for France and joined English soldiers fighting the Spanish there and in the Netherlands. A truce ended this fighting in 1598, and John returned to England a trained soldier.

Following another trip to France and to Scotland, Smith secluded himself in a wooded pasture on Lord Willoughby's property. Living in a shelter he built of tree branches, John learned how to live off the land, and he read books about the rules of war and politics. Lord Willoughby had an Italian nobleman, Signore Theodore Paleologue, visit Smith who helped him to improve his horsemanship and jousting skills. These lessons prepared Smith for his next adventure.