On 2023-12-01, multiple significant hybrid warfare incidents involving Russia and Ukraine were reported primarily affecting Russia and Ukraine, with cross-border effects noted. Key incidents include a large market fire in Rostov-on-Don, Russia, reportedly caused during this period; a drone swarm attack by Russia on Ukraine mainly targeting southern and eastern regions; a Ukrainian strike damaging Russian rail fuel supply lines in Buryatiya and Ryazan regions, admitted by Russia as sabotage; a fire at Sadovod market in Moscow with growing intensity; the arrest of a dual Russian-Italian national by Russian FSB accused of sabotage training by Ukraine; shelling by Russia in Kherson Oblast resulting in civilian casualties; relocation of Russian airborne troops to Kherson ahead of Ukrainian advances; and further ongoing Russian aviation problems exemplified by emergency landings. Ukraine claims shooting down most of the Russian drones and missiles involved in attacks on December 1. Societal and military developments also noted include heavy Russian soldier losses, arrests for sabotage, and the expulsion of Belarus from the International Federation of Red Cross for child abductions from Ukraine. The USA and NATO have increased medical and field hospital support to Ukraine. British intelligence corroborates Russian attempts to create naval proxy forces. These events are indicative of an intensifying hybrid warfare campaign by Russia involving kinetic strikes, sabotage, drone usage, espionage, and information warfare targeting Ukraine and Russian internal infrastructure under sanctions strain.

On 2023-12-01, multiple significant hybrid warfare incidents involving Russia and Ukraine were reported primarily affecting Russia and Ukraine, with cross-border effects noted. Key incidents include a large market fire in Rostov-on-Don, Russia, reportedly caused during this period; a drone swarm attack by Russia on Ukraine mainly targeting southern and eastern regions; a Ukrainian strike damaging Russian rail fuel supply lines in Buryatiya and Ryazan regions, admitted by Russia as sabotage; a fire at Sadovod market in Moscow with growing intensity; the arrest of a dual Russian-Italian national by Russian FSB accused of sabotage training by Ukraine; shelling by Russia in Kherson Oblast resulting in civilian casualties; relocation of Russian airborne troops to Kherson ahead of Ukrainian advances; and further ongoing Russian aviation problems exemplified by emergency landings. Ukraine claims shooting down most of the Russian drones and missiles involved in attacks on December 1. Societal and military developments also noted include heavy Russian soldier losses, arrests for sabotage, and the expulsion of Belarus from the International Federation of Red Cross for child abductions from Ukraine. The USA and NATO have increased medical and field hospital support to Ukraine. British intelligence corroborates Russian attempts to create naval proxy forces. These events are indicative of an intensifying hybrid warfare campaign by Russia involving kinetic strikes, sabotage, drone usage, espionage, and information warfare targeting Ukraine and Russian internal infrastructure under sanctions strain.