The city of Jammu is said to have been founded by Raja Jambulochan in the year 2900 BC. It has found several mentions in Indian epics like the Mahabharata. Years later, in Akhnoor, the excavations revealed evidence of the state being a part of the Harappan civilisation. Evidence from the Mauryan and Gupta period have also been found here. Jammu- Kashmir has seen the rule of multiple rulers in succession majorly dominated by the Hephthalites, Kushano- Hephthalites followed by the Shahi dynasty then Ghaznavids, Timur, Mughals and Sikh before the final submission to the British rule. The Dev dynasty is said to have ruled here for the longest and is considered responsible for having kept the city in isolation hindering its development. This, however, is said to have been revived by the Dogra rulers who are credited for building the infrastructure and educational facilities here. However, in the year 1947, as is known, the decision by the then Maharaja of Kashmir Hari Singh to sign the instrument of accession which made J&K a part of India has been the source of tension between India and Pakistan for decades now. As a member of the Indian Union, under article 370 of the Indian Constitution, Kashmir has been given special status as per which the state has its constitution. This was adopted in the year 1956 but only came into effect on January 26, 1957. Kashmir is the only state to have its flag which can be hoisted with the flag of the Union of India.