[oblio]

It wouldn't be the first time this happens. Romania was in a defensive alliance with Austria-Hungary in 1914. A-H attacked Serbia and asked Romania to join. Romania said: ummm... it's a defensive alliance.

So far so good, nothing wrong with that.

But in 1916 Romania decided to attack A-H. Okay, I guess?

The dumb part? As former allies, Romania used to get guns and ammo from A-H before 1916. That became a problem post-1916, for obvious reasons :-D