Ethiopia, a Third Party partner since February 2002, is "ideally located" in the Horn of Africa for unique access to targets. In 2005 the Deployed SIGINT Operation Center aka "Lion's Pride" in Addis Ababa has grown to 103 Ethiopians and eight U.S. military personnel.

This 24 February 2005 article from the internal NSA newsletter Foreign Affairs Digest describes third party cooperation and interoperability in High Frequency Direction-Finding (HFDF): see the Intercept article Japan Made Secret Deals With The NSA That Expanded Global Surveillance, 24 April 2017.

The NSA's foreign affairs director briefed the signals intelligence committee on foreign partnerships in the coming years. He stressed the importance of the agency's relationships with Ethiopia and Pakistan, and said his directorate is helping Iraq and Afghanistan "establish their SIGINT capabilities."

An article describes the current state of U.N. peacekeeping operations in sub-Saharan Africa and predicts growth in missions and personnel. There is no mention of NSA or SID participation.

Announcement of a presentation on United Nations reform by the State Department’s assistant secretary in the Bureau of International Organization Affairs.

The NSA's Signals Intelligence Liaison Officers, who are stationed with different agencies around the globe, held their annual conference at which they discussed the past year's successes; the NSA's restructuring; and their sense of isolation from the rest of the NSA, in part because SLOs cannot access NSAnet.

When the Yakima Research Center in Washington state opened in 1970, staff there received a letter and gift from an NSA facility in Ethiopia intended to collect signals from Soviet deep space vehicles.

This slide, taken from the NSA’s annual review of its cooperation with foreign partners, shows an expansion in the agency’s international relationships: see the book No Place To Hide, 13 May 2014.

This 11 January 2012 article from the internal NSA newsletter SIDToday gives a first person account of how a Korean-language analyst went about learning Tigrinya, one of the languages spoken in Eritrea: see the Intercept article The Philosopher of Surveillance, 11 August 2015.

The U.S. closed a number of High Frequency Direction-Finding sensor sites in the 1990s. To ensure they're able to track signals in areas that had previously been covered by now-shuttered stations, the Signals Intelligence Directorate worked with Second and Third Party partners to share resources and establish a global direction-finding network.