The first martyrdom in Sikh history in the reign of Jahangir was of

Guru Arjan was arrested under the orders of the Mughal Emperor Jahangir and asked to convert to Islam. He refused, was tortured and executed in 1606 CE. Historical records and the Sikh tradition are unclear whether Guru Arjan was executed by drowning or died during torture. His martyrdom is considered a watershed event in the history of Sikhism.