Russia and North Korea vow to “immediately provide military assistance” in the case of an attack on one of them, according to the newly released text of a treaty signed by leaders Vladimir Putin and Kim Jong Un.

“In the event that either party falls into a state of war due to armed aggression from an individual state or multiple states, the other party shall immediately provide military and other assistance by all means available,” Article 4 of the Treaty on Comprehensive Strategic Partnership states, according to the text carried by the Korean Central News Agency on Thursday.

Putin and