Weapons and notes left on dead North Korean troops in Russia give Ukraine a glimpse into their mindset — and show how they are quickly adapting to modern war.

The wounded fighters were taken for questioning to Kyiv, authorities said, where they could reveal details of Pyongyang’s cooperation with Moscow.

According to the Institute for the Study of War, North Korean troops in Ukraine could cease to exist by mid-April. The losses amount to nearly 100 soldiers per day. The Institute for the Study of War (ISW) reported that North Korean troops in Ukraine may cease to exist by mid-April.