Maharaja Ranjit Singh in the context of "Monocular vision"

Punjab (/pʌnˈdʒɑːb/ pun-JAHB; Punjabi: pañjāba, pronounced [pəɲˈd͡ʒaːb] ) is a state in northwestern India. Forming part of the larger Punjab region of the Indian subcontinent, the state is bordered by the Indian states of Himachal Pradesh to the north and northeast, Haryana to the south and southeast, and Rajasthan to the southwest; by Indian-administered Jammu and Kashmir to the north and Chandigarh to the east. To the west, it shares an international border with the identically named Pakistani province of Punjab, and as such is sometimes referred to as East Punjab or Indian Punjab for disambiguation purposes. The state covers an area of 50,362 square kilometres (19,445 square miles), which is 1.53% of India's total geographical area, making it the 19th-largest Indian state by area out of 28 Indian states (20th largest, if Union Territories are considered). With over 27 million inhabitants, Punjab is the 16th-largest Indian state by population, comprising 23 districts. Punjabi, written in the Gurmukhi script, is the most widely spoken and the official language of the state. The main ethnic group are the Punjabis, with Sikhs (57.7%) and Hindus (38.5%) forming the dominant religious groups. The state capital, Chandigarh, is a union territory and also the capital of the neighboring state of Haryana. Three of the five traditional Punjab rivers — the Sutlej, Beas, and Ravi — flow through the state.

The history of Punjab has witnessed the migration and settlement of different tribes of people with different cultures and ideas, forming a civilisational melting pot. The ancient Indus Valley Civilisation flourished in the region until its decline around 1900 BCE. Punjab was enriched during the height of the Vedic period, but declined in predominance with the rise of the Mahajanapadas. The region formed the frontier of initial empires during antiquity including Alexander's and the Maurya empires. It was subsequently conquered by the Kushan Empire, Gupta Empire, and then Harsha's Empire. Punjab continued to be settled by nomadic people; including the Huna, Turkic and the Mongols. Punjab came under Muslim rule c. 1000 CE, and was part of the Delhi Sultanate and the Mughal Empire. Sikhism, based on the teachings of Sikh Gurus, emerged between the 15th and 17th centuries. Conflicts between the Mughals and the later Sikh Gurus precipitated a militarisation of the Sikhs, resulting in the formation of a confederacy after the weakening of the Mughal Empire, which competed for control with the larger Durrani Empire. This confederacy was united in 1801 by Maharaja Ranjit Singh, forming the Sikh Empire.

Poonch jagir, or Poonch district, was a former semi-autonomous region in the princely state of Jammu and Kashmir. The territory was divided between India and Pakistan in 1947, represented by the present-day Poonch Division of Azad Kashmir and Poonch District of Jammu and Kashmir.

The Sikh monarch, Maharaja Ranjit Singh captured the Poonch region in 1819 and gave it to the Dogra noble, Raja Dhyan Singh, as a jagir (fief). After the death of Ranjit Singh, Dhyan Singh was murdered in Sikh intrigues, and the region was transferred to Gulab Singh as part of the Treaty of Amritsar, which established Jammu and Kashmir as a princely state under British suzerainty. The jagir of Poonch continued among Dhyan Singh's descendants as a subsidiary fief of Jammu and Kashmir. In 1928, the Maharaja of Jammu and Kashmir started encroaching into the internal administration of the Poonch Jagir and, by 1947, the status of Poonch was like a regular district of Jammu and Kashmir.

Sikhs served in the British Indian Army throughout the British Raj. After the fall of the Sikh Empire and death of its king Maharaja Ranjit Singh, the British conquered this large territory with much difficulty as it was the last kingdom in India to be taken over by the British, and began recruiting Sikhs into their army in large numbers. Sikh units fought at the Battle of Saragarhi; in the First World War, as the "Black Lions", as well as during the Second World War in Malaya, Burma and Italy.