Guru Arjan refuses, despite many days of excruciating torture, being boiled alive. Eventually, he dies, and there's slightly varying accounts of how it happens. After his death, his son, who will be known as Guru Hargobind, comes to power. And Guru Hargobind, as legend has it, on direction from his father before he would die, tells him that the Sikhs need to protect themselves. They need to adopt a military tradition to protect themselves from the oppression, especially the oppression from the Mughals. And so Guru Hargobind, he is famous for establishing the military tradition of Sikhism. He is the first guru to be what you could call a warrior saint.