Pyongyang's giant weekend parade was intended as a show of military strength aimed at Washington, Seoul, Tokyo and others with tensions soaring over its nuclear and missile ambitions.
It was also a domestic affirmation of Kim family authority over the country, analysts say.
Banners hung from buildings around Kim Il-Sung Square, which is named for the founder of the Democratic People's Republic of Korea -- as the North is officially known -- and its ruling dynasty.
Despite dying in 1994, Kim Il-Sung remains the titular leader of the North, where he is "Eternal President", and his "Juche" or "self-reliance" philosophy - centred on the concept that "man is the master of all things" - is proclaimed as its guiding tenet.
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In a speech ahead of the march, senior Kim aide Choe Ryong-Hae declared it "a loyal report to the great president Kim Il-Sung and (his son and successor) the great leader Kim Jong-Il that we are maintaining the revolutionary cause".
The parade was "a big deal for the Kim family cult in the North", said senior Rand Organisation researcher Bruce Bennett.
At the same time, Pyongyang was "sending messages of deterrence toward everyone", he added.
The new US administration of Donald Trump has ramped up pressure on Pyongyang and declared that Washington's "strategic patience" is over.
The North, which says it needs nuclear weapons to protect itself against the threat of invasion, failed with a missile launch the day after the procession and its exact military capabilities are shrouded in secrecy.
Choe told his audiences in the square, the country and abroad that the North was a "powerful nuclear-armed state" and "Asia's leader in rocketry".
North Korean parades are a regular occurrence, said Jeffrey Lewis, of the Middlebury Institute of International Studies in California. "It's like Christmas, but for Juche instead of Jesus."
Religious terminology is prominent at Kim Il-Sung's birthplace, a heavily restored grave-keeper's cottage at Mangyongdae, a rural idyll overlooking islands in the stream of the Taedong river outside the capital.
"Relics" of family life are on display, from Kim's great-grandfather's pipe to an inkstone used by the future president.
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