The Trump administration has informed Congress that Cuba contributed up to 5,000 fighters to Russia’s war in Ukraine, according to a report delivered to lawmakers on 8 April. The disclosure makes Cuban nationals one of the largest identifiable groups of foreign combatants fighting alongside Russian forces.
Why it matters
The finding gives Washington new leverage in its campaign to isolate Havana diplomatically and could trigger additional sanctions. It also reveals the breadth of foreign manpower Russia has recruited to sustain its war effort beyond North Korean troops.
The scale
The administration’s report said Cuba provided both fighters and “diplomatic and political support for Moscow.” While the public record does not prove Havana officially dispatched all the fighters, US intelligence assessed that the Cuban government knowingly tolerated and in some cases facilitated the flow.
Ukraine’s government places the figure higher. Kyiv estimates that 6,000 to 7,000 Cubans serve in the Russian military in Ukraine, making them the second-largest contingent of foreign fighters after North Korea.
Wider pressure campaign
The disclosure arrives as the White House intensifies pressure on Cuban President Miguel Díaz-Canel. The Trump administration has effectively blockaded oil shipments to the island and is working to isolate Cuba at the United Nations.
Russia has pushed back, sending another oil tanker to Cuba in defiance of the blockade. Moscow has relied on Cuban, North Korean, and other foreign fighters to offset heavy personnel losses after more than three years of war.
Congressional reaction
Lawmakers from both parties called for a stronger response. Several senators said the report justified tightening the existing embargo and designating Cuba as a state sponsor of terrorism, a status the Biden administration had removed in 2024.