Thousands of people attended the 69th Anniversary of the Korean Armed Forces Day celebration. In the photo are soldiers in a parade in Pyeongtaek, South Korea.
Among the weapons introduced at the ceremony were thousands of Hyunmoo-2 ballistic missiles and Hyunmoo-3 cruise missiles.
The latest Hyunmoo-2C missile, with a range of 800km, was made public for the first time.
Tensions on the Korean peninsula have escalated in recent weeks as North Korean leader Kim Jong-un and US President Donald Trump "fought".
South Korea's national security adviser Chung Eui-yong predicted that North Korea will take many provocations in early October, Al Jazzera reported.
South Korean President Moon Jae-in and Defense Minister Song Young-moo at the ceremony.
The war between the United States and South Korea and North Korea has not ended as the 1950-1953 North Korean War ended with a ceasefire, not a peace treaty.
The weapons system showed off on the occasion of the 69th anniversary of the Korean Armed Forces.