Niger's military junta has halted military cooperation with the United States, leading to the expulsion of 1,000 US troops and the shutdown of a US drone base.

The US now faces challenges to its counterterrorism efforts in the Sahel region following this decision.

The suspension of cooperation follows the US designation of the October military takeover in Niger as a coup, which resulted in restrictions on US military aid.

Recent high-level talks between US officials and the Nigerien junta failed to restore the bilateral military relationship.

The junta's stance, calling the US military presence 'illegal', suggests a reorientation of Niger's foreign policy and a reduction in US influence in the region.

The United States is reassessing its diplomatic strategy in West Africa in response to these developments.