Could Russian military exercises be a Trojan horse?

Over the past several months, Western defense ministries and militaries have expressed anxiety over the large-scale Russian military exercise known as "Zapad," or "West," slated to begin in mid-September and to engage virtually every element of Russian forces. In late July, Lt. Gen. Ben Hodges, commander of US Army Europe, warned that NATO allies fear "Zapad 17" could be a Russian "Trojan horse."