This is a post-Cold War agreement between the Russian Federation, the US, the UK, and Ukraine, in regards to nuclear non-proliferation, and to respect Ukrainian sovereignty. It is not a mutual defense agreement. It is not titled, as some have claimed, a Memorandum for Security Assistance. It is three governments, the US, the UK, and the Russian Federation, agreeing, individually, to abide by the six points listed above. There is no obligation to defense.