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Recent relatively high Russian aviation losses appear to be prompting a significant decrease in Russian aviation activity in eastern Ukraine, although it is unclear how long this decrease in activity will last. Ukrainian Air Force Commander Lieutenant General Mykola Oleshchuk stated on March 2 that Russian aviation activity completely stopped in eastern Ukraine around 19:00 local time following the Ukrainian downing of two Russian Su-34 aircraft.

Ukrainian Air Force Spokesperson Colonel Yuriy Ihnat stated that the decrease in Russian aviation activity continued on March 3 and that Russian forces have continued not to fly A-50 long-range radar detection aircraft following the destruction of an A-50 aircraft on February 23.

Ukrainian officials reported that Russian forces have lost 15 aircraft since February 17, which is not negligible for the Russian military given that Russia likely has about 300 various Sukhoi fighter aircraft.

Previous Russian aircraft losses have prompted Russian forces to temporarily decrease aviation activity throughout Ukraine for significant periods of time, although it remains unclear how long this current period of temporarily decreased Russian aviation activity will last.

Russian forces appeared to tolerate an increased rate of aviation losses in recent weeks in order to conduct glide bomb strikes in support of ongoing Russian offensive operations in eastern Ukraine, and the Russian command may decide in the future to assume the risk of continued aviation losses in pursuit of further tactical gains.

Transfers of North Korean weapons to Russia by sea apparently paused as of mid-February 2024. North Korea-focused outlet NK Pro reported on February 29, citing satellite imagery, that Russian ships involved in the maritime transport of North Korean ammunition and weaponry to Russia have not docked at North Korea’s Rajin Port since February 12.

NK Pro reported that Russian ships have made at least 32 trips between the Rajin Port and Russia’s Dunay and Vostochny ports, Primorsky Krai since August 2023. NK Pro reported that the Russian Lady R cargo ship transported an unspecified number of shipping containers, likely containing North Korean ammunition and weapons, between North Korea and Russia from January 30 to February 8 and that the Maia-1 cargo ship arrived at Russia’s Vostochny Port from North Korea on February 12.

NK Pro reported that satellite imagery has not captured another large cargo ship traveling between the two piers or new deliveries to the Rajin Port since February 12 and suggested that the pause could be due to production issues in North Korea or other logistical issues.

NK Pro noted that North Korea could also be transporting weapons to Russia via air or rail. ISW previously reported that Russia uses the Baikal-Amur Railway and the East Siberian Railway to facilitate cargo transfers from and to China and North Korea, both countries that Russia is increasingly relying on for economic and military support respectively to sustain its war effort in Ukraine.

South Korean Defense Minister Shin Won-sik stated on February 26 that North Korea has sent an estimated 6,700 shipping containers of ammunition to Russia in recent months.

Shin stated that these containers could carry over three million 152mm artillery shells or roughly 500,000 122mm shells.