Guru Gobind Singh was the tenth and last guru of Sikhs. Guru Gobind Singh's original name was Gobind Rai. At the time of the birth of Guru Gobind Singh, the country was ruled by the Mughals. In the meantime, Guru Tegh Bahadur's wife, Gujri Devi, gave birth to a beautiful child, known as Guru Gobind Singh. In his childhood, all the people used to call Guru Gobind as Bala Pritam. His uncles called him Gobind as God's grace. 

Guru Gobind Singh was originally a religious guru. He had no say in arms or war, but he clarified it in his letter written to Aurangzeb, "When all other means of protecting truth and justice fail, it is perfectly appropriate to hold the sword". Guru Gobind Singh sacrificed everything for the dignity of religion, culture, and the nation. In this Letter of Victory, he warned Aurangzeb that the Khalsa sect was ready to destroy your empire.

Guru Gobind Singhji has said, "When humanity is in danger because of oppression, injustice, violence, and terror, God descends on earth to destroy the wicked and protect the dharma". He himself was a great man who descended to destroy the barbaric powers of that era. He was a revolutionary man. He was a knighted nation hero. He was a statue of truth, justice, morality, boldness, perseverance, sacrifice, and courage. He established the Khalsa sect to protect his religion, his country, his freedom, and his self-esteem by incorporating courage into the Indian spirituality tradition.

Every move Gobind Singh made was calculated to instill a fighting spirit in his Sikhs. He created a body of martial poetry and music. He developed in his people a love of the sword—his “sacrament of steel.” With the Khālsā as the guiding spirit of the reconstituted Sikh army, he moved against the Sikhs’ enemies on two fronts: one army against the Mughals and the other against the hill tribes. His troops were totally devoted and totally committed to Sikh ideals, willing to risk everything in the cause of Sikh religious and political freedom. He paid a heavy price for this freedom, however. In one battle near Ambāla, he lost all four of his sons. Later the struggle claimed his wife, mother, and father. He himself was killed by a Pashtun tribesman in revenge for the death of his father.

Guru Gobind Singh Ji introduced the five ‘K’s that the Sikhs abide by:

Kesh: Uncut hair

Kangha: A wooden comb

Kara: An iron or steel bracelet worn on the wrist

Kirpan: A dagger

Kacchera: Short breeches

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