Why is the US spending more than half a billion dollars on a facility near Montreal?

The US Army is gearing up for a massive $682 million upgrade to the General Dynamics facility in Salaberry-de-Valleyfield. The upgrade is set to increase production capacity from 6 to 16 million pounds of munitions and ordnance. This facility is of great importance as it is the sole supplier of the M31A2 propellant used in 155mm artillery ammunition. Investigations have revealed this propellant to…