With reports that the ammo depot at Russia’s Hmeimim Air Base base in Syria may have been hit by an Israeli airstrike, people are warning of the dangers of horizontal escalation.
While the Air Base was probably not the intended target of the strike, it may have been hit accidentally if a missile was intercepted.
Horizontal escalation is the process by which conflicts are heightened through geographical expansion.
Ahhh right, now we see how they're going to do this.