The Panj River also called the Pyandzh River is a tributary of the Amu Darya, in Afghanistan. The river is 1,125 km long and is a part of the Afghanistan - Tajikistan border.The river starts on the border between Afghanistan and Tajikistan in the ancient region of Badakhshan. It flows westwards alongside the border of two countries. After passing the city of Khorog, capital of the Gorno-Badakhshan Autonomous Region of Tajikistan it receives water from one of its main tributaries river of Murghab. It continues to flow to the south west before getting waters from Vakhsh and Darya rivers and forming the greatest river of Central Asia- Amudarya. Panj has been playing a very important role during Soviet Times and has been a strategic river for the Soviet military operations in Afghanistan in 1980's. A tributary (or affluent or confluent) is a contributory stream, a river that does not reach the sea, but joins another major river (a parent river), to which it contributes its waters, swelling its discharge. ... The Amu Darya (Darya means river) rises in the Pamirs and flows mainly north-west through the Hindu Kush, Uzbekistan to join the Aral Sea in a large delta. ... Badakhshan is a region comprising parts of northeastern Afghanistan and of Tajikistan. ... The town of Khorog (also transliterated as Khoroq, Khorogh or Xoroq) is the centre of the Gorno-Badakhshan autonomous region in Tajikistan. ... Gorno-Badakhshan Autonomous Region (GBAR) is a mountainous province (region) of Tajikistan. ... The Murghab River, transliterated from Russian Мургаб variously as Murgab, Murghob, or Murgob and also known in its upper reaches as the Aksu or Oksu, rises in extreme northeastern Afghanistan before flowing north and west into Tajikistan, which contains the bulk of its length. ... The Vakhsh River, also known as the Surkhob (in north-central Tajikistan) and the Kyzyl-Suu (in Kyrgyzstan) is a Central Asian river, and one of the main rivers of the nation of Tajikistan. ... This article needs to be cleaned up to conform to a higher standard of quality. ... The Amu Darya (also Amudarya, Amudarya, in Persian آمودریا; Darya means sea in Persian) is a river in Central Asia. ... The Amu Darya (also Amudarya, Amudarya, in Persian آمودریا; Darya means sea in Persian) is a river in Central Asia. ... Soviet redirects here. ... Soviet redirects here. ...