The Waha concessions are located in the Sirte Basin in eastern Libya. Over 50 discoveries have been made since the acreage was awarded in 1955 to the original Oasis Oil Company (a consortium of Conoco, Marathon and Amerada Hess). Oil production peaked at 950,000 b/d in 1970. In 1986, all US companies were forced to withdraw from Libya by the US Government. The US companies re-gained their interests in the fields in late 2005, following an improvement in relations between Libya and the US. Following the re-entry of the US companies, oil production stabilised at around 360,000 b/d. Since the civil war in 2011, production has been severely impacted by ongoing labour strikes, blockades of export terminals and a general deterioration in security affecting Libya. Political unrest in December 2014 led to force majeure at the export ports of Es Sider and Ras Lanuf. Extensive damage was sustained at both ports in January 2016 following militant attacks.