When was Sikhism developed ?

Sikhism originated in Punjab with the teachings of Guru Nanak Dev (1469-1539), who was born a Hindu. Conceived as a monotheistic faith, a sort of bridge between Hinduism and Islam, Sikhism, in fact, developed as a militant sword-arm for the protection of Hinduism. Guru Nanak Dev himself lived at a time when Babar was on his numerous invasions of India, culminating in the battle of Panipat, which brought in their wake unprecedented rapine and massacre of the Hindus. Guru Nanak’s message both to the Hindus and the Muslims was one of humanity, goodwill, compassion and high ethical conduct. He was followed by a series of high-minded Gurus.