Why did the knights templar start?

The Poor Fellow-Soldiers of Christ and of the Temple of Solomon (Latin: Pauperes commilitones Christi Templique Solomonici), commonly known as the Knights Templar or the Order of the Temple (French: Ordre du Temple or Templiers), were among the most famous of the Western Christian military orders.[3] The organization existed for approximately two centuries in the Middle Ages. It was founded in the aftermath of the First Crusade of 1096, to ensure the safety of the many Europeans who made the pilgrimage to Jerusalem after its conquest.