The situation in Niger has been brewing for years. The French military has been bombing civilians in their "anti-terror" operation. Nigeriens are waving Russian flags because the Russians are actually good at fighting the insurgents and protecting civilians at the same time. In fact, France's actions have been making the situation in the Sahel WORSE!

I doubt the USA has much to do with this coup. The reality is that Neocolonial armies are ripe with contradictions, and one of the outbursts of that is a military mutiny in defense of the exploited masses, as we have seen with Burkina Faso, Libya, Cuba, and Venezuela.