Guru Hargobind ji (1606-1644)
Overview
While in prison, before his execution at Lahore, Guru Arjun had sent a message to his son, Guru Hargobind, then aged only eleven, that he should henceforth maintain an army. At the very time of his installation as Guru, he insisted that he should wear two swords, one representing his spiritual leadership and the other his temporal and political leadership. Soon after it, he constructed in front of the Amritsar temple, another building called the Akal Takht (God's throne) as the seat of temporal power. This place continues to the present day as the centre of every sociopolitical deliberation and power of the community. There, like the two swords he wore, he raised aloft two flags representing the two aspects of his activities. He told his followers, "My rosary shall be my swordbelt and on my turban I shall wear the emblem of royalty." The Sikhs were already engaged in the trade of horses and the Guru advised every Sikh to keep a sword and maintain a horse, wherever possible. He started recruiting a regular army. He had a personal bodyguard of 57 horsemen and kept 700 horses, 60 gunmen and 500 infantry men. Thus a state within a state, started and developed by the earlier Gurus, was consolidated by him. When this news reached the Emperor, he demanded from the Guru the fine imposed on his father. The Guru was imprisoned in the Gwalior fort along with other political prisoners of high status. Later he was released.
See more at this link
http://www.sikh-history.com/sikhhist/gurus/nanak6.html
Overview
While in prison, before his execution at Lahore, Guru Arjun had sent a message to his son, Guru Hargobind, then aged only eleven, that he should henceforth maintain an army. At the very time of his installation as Guru, he insisted that he should wear two swords, one representing his spiritual leadership and the other his temporal and political leadership. Soon after it, he constructed in front of the Amritsar temple, another building called the Akal Takht (God's throne) as the seat of temporal power. This place continues to the present day as the centre of every sociopolitical deliberation and power of the community. There, like the two swords he wore, he raised aloft two flags representing the two aspects of his activities. He told his followers, "My rosary shall be my swordbelt and on my turban I shall wear the emblem of royalty." The Sikhs were already engaged in the trade of horses and the Guru advised every Sikh to keep a sword and maintain a horse, wherever possible. He started recruiting a regular army. He had a personal bodyguard of 57 horsemen and kept 700 horses, 60 gunmen and 500 infantry men. Thus a state within a state, started and developed by the earlier Gurus, was consolidated by him. When this news reached the Emperor, he demanded from the Guru the fine imposed on his father. The Guru was imprisoned in the Gwalior fort along with other political prisoners of high status. Later he was released.
See more at this link
http://www.sikh-history.com/sikhhist/gurus/nanak6.html