NATO allies have been concerned about Russia’s aggression since the annexation of Crimea from Ukraine in 2014.
As a result, Barack Obama has deployed troops to Poland in an effort to increase its security.
Donald Trump has questioned the value of NATO, in comments that delighted Moscow, which has led to many anxiously waiting to see what action he takes regarding the US presence in eastern Europe.
While jokes have been made that a Trump presidency could result in nuclear war, there are increasing grounds to believe that a war between NATO and Russia could happen.
How could tensions escalate, and what damage would each side do?
source
