Cuba: An Island in Peril - Diplomatic Solution or Conflict?

Key takeaways

• Island sovereignty acts as a defensive paradox, where maritime isolation provides a strong protective moat against invasion, but leaves nations vulnerable to economic collapse via naval blockades.

• A 2026 US energy blockade targeting Cuba's fuel imports has triggered a humanitarian and economic crisis, marked by 20-hour daily blackouts, toxic waste burning, and violent protests.

• Washington is increasing pressure on Cuba to eliminate a perceived, nearby Marxist threat and diminish the influence of Russia, China, and Iran in the Western Hemisphere. The strategy aims to force a transition to democracy and market capitalism, while also asserting US hegemony in the region.

• Fears of secondary US sanctions have restricted Cuba's allies to providing only humanitarian aid, halting crucial oil shipments.

• Ongoing conflicts and low domestic approval ratings ahead of the November 2026 midterms make a high-risk invasion of Cuba unlikely.

• Severe energy deficits and US sanctions have paralysed Cuba's economy, causing major foreign companies and airlines to flee or scale back operations. The crisis has crippled tourism, triggered widespread hospitality bankruptcies, and forced hospitals to rely on fragile backup power systems.

Island isolation: A double edged sword

The fact that island sovereignty is both a defensive strength, as well as a weakness, is a situational paradox. History is littered with examples of nations benefitting from maritime isolation within the context of defence and national security. One prominent example is how Great Britain, with the English Channel, North Sea, Atlantic Ocean, and Irish Sea acting as a strategic moat, resisted German occupation during World War II while the rest of Europe, which lacked the same geographical boundary, fell. Similarly, many analysts point to the Taiwan Strait, which is 160km wide at its narrowest point, as a key guarantor of Taiwan’s sovereignty in the face of growing Chinese pressure. This point is made even more compelling when you consider that the Chinese Communist Party took control of Hainan, an island that sits between 20km and 30km from mainland China, from the Kuomintang following an amphibious invasion in 1950. Had the Taiwan Strait been the same distance as the Qiongzhou Strait (which separates Hainan from the mainland), the two islands would likely have shared the same fate.

On the other hand, maritime borders can also act as a weakness. In many cases, these relate to the threat posed by an enemy weaponising a nation’s island geography by enforcing a maritime blockade. For instance, during World II, the US military launched Operation Starvation, a massive naval campaign that saw the military drop thousands of sea mines to create a blockade. With Japan dependent on imports for 20% of their food demands and 90% of their oil requirements, the impacts were severe, triggering a food and energy crisis.

Unfortunately for Cuba, recent months have demonstrated that it firmly falls within the latter category. Since February 2026, the US has enforced an energy blockade on Cuba by threatening trade tariffs and physically intercepting foreign tankers. Consequently, the island, which has been without diesel for generators since January 2026, is suffering from an unprecedented energy crisis. This has resulted in blackouts lasting over 20 hours per day, violent protests over the situation, and difficulties in disposing of garbage from Havana, which has prompted Cubans to burn waste, releasing toxic chemicals. Washington’s maximum pressure campaign is believed to be aimed at either toppling the communist regime or forcing them to open up to capitalism.

In addition to the blockade, Washington has also employed a range of additional measures against Cuba. Most recently this took the form of leveraging economic sanctions on Cuban President Miguel Diaz-Canel, a member of his immediate family, and members of the Castro family. The Treasury Department announced the move on 04 June 2026, with US President Donald Trump calling for Cuba “to be a nicely run country”.

Why is the US targeting Cuba?

Although the US has had an embargo on Cuba for decades, Trump has drastically ramped up pressure on the island in recent months and openly mused about taking it over. One recent threat included a statement to reporters in which he asserted: “We’ll take care of the Islamic republic of Iran, and as soon as that’s done, on our way back, we’ll just make a little brief stopover”, alluding to Cuba. With the situation in the Middle East persisting, you could be forgiven for forgetting the Trump administration’s strategic policy objective of reorienting its focus towards the Western hemisphere. The toppling of former Venezuelan President Nicolas Maduro in January 2026, followed by the installation of the compliant Dely Rodriguez, demonstrated Washington’s ambition to assert unmitigated hegemony over its sphere of influence. Cuba’s ideological alignment with Russia, China, and Iran reinforces US perceptions of an adversarial autocratic state located close to its borders. This illustrates a major strategic element behind the decision to target Cuba.

There is also a strong ideological motivation for the US to target Cuba. Following the latest bout of sanctions, US Secretary of State Marco Rubio wrote on social media that the US would “no longer” tolerate radical Marxist regimes exporting their “poisonous and evil revolution” to the US and elsewhere. Such ideological traits originate from the Cold War, with the ideological divide between US capitalism and democracy with Cuba’s Marxist-Leninist state-run socialism persisting. The Trump administration hopes that its maximum pressure campaign will force a transition in Cuba towards democracy and a market economy.

The limits of assistance for Cuba

As mentioned prior, the removal of Maduro constituted the decapitation of both a key ally, as well as a crucial energy supplier for Cuba. With the US taking operational control over the country’s oil sector, the historic oil-for-doctors arrangement between Venezuela and Cuba has been halted. Other international developments have proven similarly problematic for Cuba. One example is Russia’s ongoing war of attrition in Ukraine, which has left Moscow with little bandwidth for assisting its allies. Although Russia sent an oil tanker to Cuba, which the US allowed through on humanitarian grounds, the gesture was a far cry from meeting the island’s comprehensive needs. No other country has dared to send fuel from fear of incurring US secondary sanctions.

In 2025, Mexico’s Pemex supplied Cuba with US$496 million of oil to Cuba. Mexico became Cuba’s main supplier of oil after the US blocked Venezuelan tankers in December 2025. However, this supplier was also cut off in January 2026 to avoid a trade war with the US. Mexican President Claudia Sheinbaum has instead opted to send shipments of humanitarian aid. Brazil has similarly assisted Cuba by providing thousands of tonnes of critical food and medical supplies, albeit while also refusing to send oil or fuel. China has also followed suit, having announced the first shipment of 60,000 tonnes of rice in May 2026. Colombia and Spain have also taken similar actions.

Diplomatic solution or conflict?

On 29 May 2026, the Commander of US Southern Command, General Francis Donovan, met with senior Cuban military officials on the perimeter of Guantanamo Bay, a US military installation located in Cuba’s southeast. With both delegations considering the meeting to have been positive, there is some hope concerning a diplomatic pathway. However, Trump’s repeated threats regarding a takeover of the island, coupled with the US military’s decision to broadcast the location of military surveillance flights near Cuba, have caused deep concerns in Havana. Reports have indicated that Cuba is in possession of 300 drones and that Havana had been considering options to strike nearby US targets.

At the current time, all options remain on the table. Stalled peace negotiations in Iran, coupled with the upcoming November 2026 midterm elections, are likely to deter Washington from pursuing an invasion. Trump’s approval ratings have hit new lows, in part as a result of the Iran war; another risky conflict far closer to US territory is unlikely to be well-received. Additionally, to enter a war under such circumstances could also provide Cuba with leverage as they will be aware that prolonging the conflict could force an American withdrawal or extract more favourable peace terms. As an alternative to launching a full-scale invasion, Trump could turn to limited operations similar to those seen in Venezuela or expand the blockade and concurrent measures against Cuba. Such options could increase the probability of Washington achieving its objectives, while avoiding the level of risk associated with a full invasion. The botched 1961 Bay of Pigs invasion stands as a stark warning against attempting regime change in Cuba via conflict.

Business impacts - a dire outlook

The combined effects of the energy crisis, rolling blackouts, and economic sanctions have plunged the Cuban economy into near-total paralysis. While many foreign companies are fleeing the island to avoid being penalised, others have decided to continue with reduced operations. The situation has hit the tourism sector particularly hard, with major air carriers pausing services. Hospitality venues have also experienced widespread bankruptcies, while hospitals are increasingly reliant on fragile backup systems that were never intended for continuous use. With little indication that the US will loosen or relinquish its campaign, these impacts are set to become even more severe moving forward.