Partition of India: The Maharaja of Kashmir and Jammu signs the Instrument of Accession with India, beginning the Indo-Pakistani War of 1947–1948 and the Kashmir conflict.

The partition of India in 1947 was the division of British India into two independent dominion states, the Union of India and Dominion of Pakistan. The Union of India is today the Republic of India, and the Dominion of Pakistan is the Islamic Republic of Pakistan and the People's Republic of Bangladesh. The partition involved the division of two provinces, Bengal and the Punjab, based on district-wise non-Muslim or Muslim majorities. It also involved the division of the British Indian Army, the Royal Indian Navy, the Indian Civil Service, the railways, and the central treasury, between the two new dominions. The partition was set forth in the Indian Independence Act 1947 and resulted in the dissolution of the British Raj, or Crown rule in India. The two self-governing countries of India and Pakistan legally came into existence at midnight on 14–15 August 1947.

Jammu and Kashmir, also known as Kashmir and Jammu, was a princely state in a subsidiary alliance with the British East India Company from 1846 to 1858 and under the paramountcy of the British Crown, from 1858 until the Partition of India in 1947, when it became a disputed territory, now administered by three countries: China, India, and Pakistan. The princely state was created after the First Anglo-Sikh War, when the East India Company, which had annexed the Kashmir Valley, from the Sikhs as war indemnity, then sold it to the Raja of Jammu, Gulab Singh, for 75 lakh rupees.

The Jammu and Kashmir Instrument of Accession is a legal document executed by Maharaja Hari Singh, ruler of the princely state of Jammu and Kashmir, on 26 October 1947.

The Indo-Pakistani war of 1947–1948, also known as the first Kashmir war, was a war fought between India and Pakistan over the princely state of Jammu and Kashmir from 1947 to 1948. It was the first of four Indo-Pakistani wars between the two newly independent nations. Pakistan precipitated the war a few weeks after its independence by launching tribal lashkar (militias) from Waziristan, in an effort to capture Kashmir and to preempt the possibility of its ruler joining India.