Between Sept. 14-20, the Russian armed forces will conduct a major exercise, ZAPAD 2017. Employing forces from various Russian commands, the exercise will test the military's ability to conduct a combined arms offensive. That's exactly the kind of operation Russia would use to invade Europe. While there's nothing new in the Russians carrying out a military exercise, this situation is different due to the scale and location of the forces involved. Russia claims under 10,000 personnel will be involved but as many as 100,000 Russian soldiers are actually expected to deploy. Their number will include armored and artillery units, and...