It did not specify which US-South Korean military trainings it was referring to.

Source: https://www.alloaadvertiser.com/news/national/23327992.north-korea-threatens-unprecedented-response-south-us-drills/?ref=rss

South Korean president Yoon Suk-yeol visited Command Post Tango, a bunker complex for the US-South Korea combined forces, and said, according to his office, that the joint drills are a “source of power to deter North Korea’s provocations”.

Source: https://www.independent.co.uk/asia/east-asia/south-korea-air-defence-drill-north-korea-b2397939.html

The fifth meeting was held on the eve of the joint US-South Korean exercises Freedom Shield.

Source: https://www.weeklyblitz.net/news/tass-kim-jong-un-discussed-the-means-and-effectiveness-of-military-deterrence/?utm_source=rss&utm_medium=rss&utm_campaign=tass-kim-jong-un-discussed-the-means-and-effectiveness-of-military-deterrence