Who among the following was responsible for making "Sikhism' a militant force?

Guru Har Govind Singh was the first guru to engage in warfare advising the Sikhs to take part in military training and martial arts. He also constructed Akal Takht. Guru Har Govind began the transformation of Sikhs from a peaceful community to militant fighting community but it was the leadership of Guru Teg Bahadur which made Sikhs a complete political and military force.