Sir Creek in the context of "Sindh"

Pakistan, officially the Islamic Republic of Pakistan, is a country in South Asia. It is the fifth-most populous country, with a population of over 241.5 million, having the second-largest Muslim population as of 2023. Islamabad is the nation's capital, while Karachi is its largest city and financial centre. Pakistan is the 33rd-largest country by area. Bounded by the Arabian Sea on the south, the Gulf of Oman on the southwest, and the Sir Creek on the southeast, it shares land borders with India to the east; Afghanistan to the west; Iran to the southwest; and China to the northeast. It shares a maritime border with Oman in the Gulf of Oman, and is separated from Tajikistan in the northwest by Afghanistan's narrow Wakhan Corridor.

Pakistan is the site of several ancient cultures, including the 8,500-year-old Neolithic site of Mehrgarh in Balochistan, the Indus Valley Civilisation of the Bronze Age, and the ancient Gandhara civilisation. The regions that compose the modern state of Pakistan were the realm of multiple empires and dynasties, including the Achaemenid, the Maurya, the Kushan, the Gupta; the Umayyad Caliphate in its southern regions, the Hindu Shahis, the Ghaznavids, the Delhi Sultanate, the Samma, the Shah Miris, the Mughals, and finally, the British Raj from 1858 to 1947.

The India–Pakistan border is the international boundary that separates the nations of the Republic of India and the Islamic Republic of Pakistan. At its northern end is the Line of Control, which separates Indian-administered Jammu & Kashmir from Pakistani-administered Kashmir; and at its southern end is Sir Creek, a tidal estuary in the Rann of Kutch between the Indian state of Gujarat and the Pakistani province of Sindh.

Arising from the partition of India in 1947, the border covers the provincial boundaries of Gujarat and Rajasthan with Sindh, and the Radcliffe Line between the partitions of Punjab. It traverses a variety of terrain in the northwestern region of the subcontinent, ranging from major urban areas to inhospitable deserts. Since the beginning of the India–Pakistan conflict shortly after the two countries' conjoined independence, it has been the site of numerous cross-border military standoffs and full-scale wars. The border's total length is 3,323 kilometres (2,065 mi) according to figures given by PBS; it is also ranked as one of the most dangerous international boundaries in the world, based on an article written in Foreign Policy in 2011. During the nighttime, the India–Pakistan border is distinctly visible from outer space due to the 150,000 floodlights installed by India on approximately 50,000 poles.

The Ghaggar-Hakra River (IPA: [ɡʰəɡːəɾ ɦəkɾaː]) is an intermittent river in India and Pakistan that flows in force only during the monsoon season. The river is known as Ghaggar before the Ottu barrage at 29°29′15″N 74°53′33″E / 29.4875°N 74.8925°E / 29.4875; 74.8925, and as Hakra downstream of the barrage in the Thar Desert. In pre-Harappan times the Ghaggar was a tributary of the Sutlej. It is still connected to this paleochannel of the Sutlej, and possibly the Yamuna, which ended in the Nara River, presently a delta channel of the Indus River joining the sea via Sir Creek.

The Sutlej changed its course about 8,000–10,000 years ago, leaving the Ghaggar-Hakra as a system of monsoon-fed rivers terminating in the Thar Desert. The Indus Valley Civilisation prospered when the monsoons that fed the rivers diminished around 5,000 years ago, and a large number of sites from the Mature Indus Valley Civilisation (2600–1900 BCE) are found along the middle course of the (dried-up) Hakra in Pakistan. Around 4,000 years ago, the Indus Valley Civilisation declined when the monsoons further diminished, and the Ghaggar-Hakra dried up, becoming a small seasonal river.