Why did the US Army order Russian helicopters instead of using their own?
Q: Why did the US Army order Russian helicopters instead of using their own?;
Because the US Army is not using those helicopters. Those helicopters are being purchased for the Afghan military. The helicopters perform well in Afghanistan (the environment can be rough between the dust and elevation), can be used for various purposes, and Russian stuff tends to be cheaper and easier to maintain (and Afghans are more likely to already know how to maintain them). Also, when the Afghan government fails it won’t be US aircraft that the Taliban captures.