Russian President Vladimir Putin has formally enacted a mutual defence treaty with North Korea, marking a significant step in the two nations' strategic partnership. The accord, initially announced in June following a summit in Pyongyang between Putin and North Korean leader Kim Jong Un, mandates that each country will come to the other’s defence in the event of an armed attack. A decree enacting the treaty was published on an official Russian legislative website, confirming that the agreement has been ratified by the Russian parliament. (With inputs from Reuters)