The nuclear-armed North is on an Olympics-linked charm offensive -- sending a troupe of performers, hundreds of female cheerleaders, and the sister of leader Kim Jong Un to South Korea.
But regiments of soldiers goose-stepped in formation through Kim Il Sung Square today, followed by trucks, artillery, tanks and finally four giant Hwasong-15 ICBMs -- as well as a band forming the Korean word for "Victory".
Fireworks went off as leader Kim Jong Un took his place on the rostrum to watch the display, along with his wife Ri Sol Ju and the ceremonial head of state Kim Yong Nam -- who will head Pyongyang's delegation to the Olympics tomorrow.
"We ... have become capable of showcasing our stature as a world-class military power to the world," said Kim, wearing a long black coat and black fedora.
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The military should remain on high alert to ensure that invaders could not violate the North's sovereignty "even by 0.001mm", he said.
Analysts say that with the dual approach, the North is looking to normalise its status as a "de facto nuclear state", and could be trying to weaken sanctions against it or drive a wedge between the South and its ally the US.
North Korea is under multiple sets of UN Security Council sanctions over its banned nuclear weapons and ballistic missile programmes, which have seen it develop rockets capable of reaching the US mainland.
Pyongyang last month announced it was changing the date of its military commemoration from April 25 to February 8 -- the day before the Games' opening ceremony in Pyeongchang, just 80 kilometres south of the Demilitarized Zone (DMZ) that divides the peninsula.
"It looks like North Korea had potential reaction from the international community in mind and toned down the scale and message of the event a lot," said Lim Eul-Chul, a North Korean studies professor at Kyungnam University.
The North's high-level delegation for the Olympics is being led by its ceremonial head of state Kim Yong Nam, the highest-level official ever to visit the South, and also includes Kim Jong Un's sister Kim Yo Jong -- an increasingly powerful and influential figure.
US Vice President Mike Pence arrived in the South later today and is also scheduled to attend the opening ceremony in Pyeongchang tomorrow.
That could put him in the same room as Kim Yong Nam, raising the prospect of senior figures from the two sides meeting after a year in which their leaders traded personal insults and threats of war.
Senior Pyongyang foreign ministry official Cho Yong Sam said the North had "no intention" of meeting US authorities during the trip.
"We'll have to wait and see exactly how that unfolds."
The Winter Olympics have triggered a rapid rapprochement on the peninsula, although analysts warn that warmer relations may not last long beyond the Games.
Tensions soared last year as the North carried out multiple weapons tests, including the Hwasong-15 capable of reaching the US mainland, and by far its most powerful nuclear test to date.
That set off a rapid series of meetings which saw the two Koreas agree to march together at the opening ceremony and form a unified women's ice hockey team, their first for 27 years.
But critics in the South say Seoul has made too many concessions to Pyongyang, and demonstrators protested the arrival of the art troupe earlier this week.
US charge d'affaires to Seoul Marc Knapper dismissed concerns about a Northern charm offensive towards the South.
"It sends a strong message about what happens when leaders make the right choices about how their society will develop.