Ranjit Singh, popularly known as Sher-e-Punjab or "Lion of Punjab", was the first Maharaja of the Sikh Empire, which ruled the northwest Indian subcontinent in the early half of the 19th century. He survived smallpox in infancy but lost sight in his left eye. He fought his first battle alongside his father at age 10. After his father died around Ranjit's early teenage years, Ranjit subsequently fought several wars to expel the Afghans throughout his teenage years. At the age of 21, he was proclaimed the "Maharaja of Punjab". His empire grew in the Punjab region under his leadership through 1839.

Sikhs are an ethnoreligious group who adhere to Sikhism, a religion that originated in the late 15th century in the Punjab region of the Indian subcontinent, based on the revelation of Guru Nanak. The term Sikh has its origin in the Sanskrit word śiṣya, meaning 'seeker', 'disciple' or 'student'. According to Article I of Chapter 1 of the Sikh Rehat Maryada, the definition of Sikh is: Any human being who faithfully believes in One Immortal Being Ten Gurus, from Guru Nanak Sahib to Guru Gobind Singh Sahib The Guru Granth Sahib The utterances and teachings of the ten Gurus and The initiation, known as the Amrit Sanchar, bequeathed by the tenth Guru and who does not owe allegiance to any other religion, is a Sikh.