Tens of thousands of troops, followed by waves of tanks, armoured vehicles and ballistic missiles, goose-stepped their way through Pyongyang's Kim Il-Sung Square in one of the largest ceremonial displays of military muscle the country had ever organised.
In his first public speech for three years, Kim struck a far more belligerent tone than in previous addresses, with a special message for the North's traditional enemy.
"Our party dauntlessly declares that our revolutionary armed forces are capable of fighting any kind of war provoked by the US," the young leader proclaimed to rapturous applause from thousands of top military officers and party officials assembled below his viewing platform.
North Korean threats to wipe out the US and neighbouring South Korea are common-place, but this was a particularly pointed message of defiance, given in the most public of forums before the cameras of the invited international media.
Kim also seized what amounted to a rare photo opportunity to underline his country's traditional alliance with China, which has shows signs of strain since he took power following the death of his father, Kim Jong-Il, in 2011.
China remains North Korea's main diplomatic protector and economic partner, but relations have soured in recent years with Beijing becoming increasing wary of Pyongyang's nuclear ambitions.
Today's parade had been expected to start in the morning, but heavy overnight rain and overcast skies saw it delayed until 3:00pm (0630 GMT) when the weather broke in a blaze of sunshine and blue skies.
The overriding theme of the parade was the glorification of the ruling Workers' Party that has served at the whim of the three generations of the Kim family for the last seven decades.
