The United States and Niger issued a joint statement on Sunday announcing that all American troops will depart from the West African country no later than September 15.
The statement confirmed a disengagement agreement had been reached, with the withdrawal of U.S. forces already underway following four days of talks in Niamey.
Last year, Niger expelled French troops who were also stationed in the country following a military coup.
Additionally, Niger withdrew from the French-backed G5 Sahel force, citing ineffectiveness and concerns over African sovereignty. Instead, Niger has formed a defense pact called the Alliance of Sahel States with Burkina Faso and Mali.
The U.S. constructed a $100 million military base in Agadez six years ago to monitor and gather intelligence on terrorist activities in the region, housing over 1,000 troops.
However, relations deteriorated after the elected president, Mohamed Bazoum, was ousted in a coup last year.
Since then, the junta has aligned more closely with Russia, welcoming military instructors from Moscow into the country.