Putin recruited approximately 12,000 North Korean troops to defend Kursk after Russian conscripts refused to be deployed there.

Russian conscripts refused to defend Kursk despite it being Russian territory, forcing the Kremlin to find alternative troop sources rather than activate conscription due to political concerns about domestic protests.

Spanish government investigations revealed that the MV Ursa Major was actually carrying nuclear reactor components designed to power nuclear submarines, not icebreaker equipment as the cover story claimed.

The nuclear reactor shipment to North Korea was part of a secret annex to the formal North Korea-Russia military compensation package for North Korean military assistance in Kursk.

Ukraine may have evaded initial scrutiny for the MV Ursa Major attack because despite the difficulty of Nord Stream sabotage, Ukraine's plausible involvement was not obvious at the time of the sinking despite having clear motive.

The MV Ursa Major sank in the Mediterranean Sea on December 23, 2024, between Spain and Algeria, with reports initially indicating an explosion in the engine room caused the sinking and two crew members died.

No nuclear fuel was involved in the MV Ursa Major cargo, only reactor component parts, so environmental catastrophe from potential radioactive contamination is not a concern.

Russia intended to transport the nuclear reactors to North Korea instead of Vladivostok, and the cranes onboard the MV Ursa Major were necessary because North Korean ports lacked proper cargo offloading infrastructure.

North Korea released the first images of a nuclear submarine program right as Spain's investigation into the Ursa Major incident became public, suggesting strategic timing and coordination with the reactor transfer discussion.

Icebreaker equipment could have been transported by rail, but the reactor components were too heavy for rail transport, making a naval route necessary and distinguishing the actual cargo from the claimed icebreaker equipment.

The damage to the MV Ursa Major's hull had inward-bent edges, indicating the blast originated from outside the ship rather than from internal engine room failure.

A Russian naval ship (Ivan Gren) commandeered control of the search and rescue site around the MV Ursa Major, an unusual action if the vessel was only transporting civilian goods.

The Russian naval ship fired multiple flares around the sinking MV Ursa Major as if to obscure Spanish intelligence collection efforts.

Seismographs collected data at the time of the MV Ursa Major sinking consistent with large explosions at the site, as if Russia wanted to blast away any lingering evidence.

Ukraine had obvious motive to attack the MV Ursa Major as a Russian vessel during wartime, and had previously demonstrated capability in the Nord Stream pipeline sabotage operation.

Ukraine has recently demonstrated capacity to strike Russian naval vessels at long distances with attacks on a submarine at a Black Sea port in December 2024 and multiple tanker vessels across the Black Sea and Mediterranean regions.

Ukraine would be unusual as the sole culprit if it developed supercavitating torpedo technology in the gap between late 2024 and the present, yet waited almost a year before conducting similar long-range maritime attacks, breaking established operational patterns.

The MV Ursa Major's captain testified that the damage pattern was inconsistent with a conventional torpedo but consistent with a supercavitating torpedo, according to the La Verdad article.

Supercavitating torpedoes can move fast enough to destroy ships through pure ramming speed rather than requiring an explosive warhead.

Few countries possess supercavitating torpedo technology: Russia, Iran (through Soviet design reverse-engineering), Germany, the United States, China, and South Korea are confirmed or probable developers, but Ukraine is notably absent from this list.