Koch is a community in Unity State, South Sudan

South Sudan

South Sudan , officially the Republic of South Sudan, is a landlocked country located in the Sahel region of northeastern Africa. It is also part of the North Africa UN sub-region. Its current capital is Juba, which is also its largest city; the capital city is planned to be moved to the more...

, headquarters of Koch County

Koch County

Koch County is an administrative division of Unity State, South Sudan, covering an area in the center of the state.The administrative center is the town of Koch.Large villages include Dhor Wang, Thorial, Duar, Wath-Thier and Bieh....

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The community lies in Jagei Nuer territory.
It is within the Block 5A

Block 5A, South Sudan

Block 5A is an oil concession in South Sudan.After oil field development began during the Second Sudanese Civil War, Block 5A was the scene of extensive fighting as rival militias struggled for control....

 oil concession. Between 1998 and 2003 the community was attacked many times by government-supported troops or militias.
In 2002 the community was repeatedly attacked by a government Antonov bomber and helicopter gunships.

On 31 January 2000, Riek Machar

Riek Machar

Riek Machar Teny Dhurgon , is the first vice-president of the independent Republic of South Sudan.Riek Machar obtained a PhD in mechanical engineering in 1984 and then joined the rebel Sudan People's Liberation Movement/Army during the Second Sudanese Civil War...

 formally resigned from the government and called on his commanders and Nuer chiefs to meet him at Koch. United Nations

United Nations

The United Nations is an international organization whose stated aims are facilitating cooperation in international law, international security, economic development, social progress, human rights, and achievement of world peace...

planes were used under false pretenses to transport leaders to the conference, where the Sudan People's Defence Forces / Democratic Front was announced.