Complex sentence: The Sikhs abolished Mughal rule in the whole province in one stroke and where the first army in history to destroy the Mughal Empire and conquer Afghanistan, which lead to the creation of a Sikh Empire in the late-17th century.
Split into simpler sentences: The Sikhs abolished the Mughal rule in the whole province in one stroke and where the first army in history to destroy the Mughal Empire and conquer Afghanistan. Which lead to the creation of a Sikh Empire in the late-17th century.