As tensions escalate between the United States and Iran and reports of civilian casualties continue to emerge, a growing number of Iranians in the diaspora have openly supported U.S. President Donald Trump and his confrontational posture toward the Islamic Republic. Many of them believe that weakening or toppling Iran’s theocratic leadership could pave the way for democracy and greater freedom inside the country.
For these supporters, the possibility of regime change represents hope for a future free from clerical rule. Yet critics warn that enthusiasm for foreign-led political upheaval often overlooks the historical consequences of similar interventions carried out by Washington across the world. Over the past several decades, attempts by the United States to reshape governments abroad have frequently produced instability, authoritarian rule, or prolonged conflict rather than the democratic transformation promised at the outset.
As the debate intensifies, analysts and historians are revisiting some of the most controversial U.S.-backed regime change operations to understand the risks of repeating the past.
One of the most widely cited examples is the 1973 overthrow of Chile’s democratically elected president, Salvador Allende. Allende, a Marxist politician, came to power through a legitimate election in 1970, triggering alarm in Washington during the height of the Cold War. The administration of U.S. President Richard Nixon and his national security adviser Henry Kissinger quickly intensified covert efforts to undermine the Chilean government.
According to declassified records, the United States poured millions of dollars into clandestine operations aimed at destabilizing the Chilean economy and encouraging opposition to Allende’s leadership. Nixon later acknowledged that concerns about growing leftist influence in Latin America drove the intervention, warning at the time that Chile under Allende and revolutionary Cuba under Fidel Castro could form what he described as a “red sandwich” across the region.
In September 1973, Chile’s military launched a coup that ended Allende’s presidency and installed General Augusto Pinochet as the country’s leader. The dictatorship that followed lasted 17 years and became synonymous with political repression. Human rights organizations estimate that tens of thousands of Chileans were tortured, while between 2,600 and 3,400 people were executed or forcibly disappeared during Pinochet’s rule. Although Chile eventually returned to democracy, the era left deep scars that continue to shape the country’s politics decades later.
Another example frequently cited in discussions of regime change is the NATO intervention in Libya in 2011. During the wave of uprisings known as the Arab Spring, Western powers intervened militarily against the government of Libyan leader Muammar Gaddafi after his forces violently suppressed anti-government protests.
The intervention, carried out by NATO forces with strong backing from Washington, targeted Libyan military infrastructure and ultimately supported rebel groups seeking to remove Gaddafi from power. During the final stages of the conflict, U.S. airstrikes hit a convoy carrying the Libyan leader as he attempted to flee the city of Sirte. Rebel fighters later captured and killed him.
At the time, the outcome was celebrated by some Western leaders. Then U.S. Secretary of State Hillary Clinton famously remarked to reporters, “We came, we saw, he died,” in reference to Gaddafi’s fall.
Yet the years that followed painted a far more complicated picture. With the collapse of the central government, Libya descended into factional fighting among rival militias and political groups competing for power. The country endured years of civil war, leaving thousands dead and creating a fractured state divided between competing administrations. More than a decade later, Libya continues to struggle with economic instability, armed militias, and fragile political institutions.
In Africa, one of the earliest Cold War interventions involved the political turmoil that followed independence in the Democratic Republic of Congo. When Belgium abruptly withdrew from its colony in 1960, the newly independent nation was plunged into crisis. Its first prime minister, Patrice Lumumba, sought assistance from the Soviet Union to stabilize the country, a move that alarmed Western governments already wary of communist influence spreading across Africa.
U.S. officials began exploring ways to remove Lumumba from power, viewing his outreach to Moscow as a potential geopolitical threat. Intelligence operations reportedly encouraged protests against his government and cultivated alliances with military leaders, including army commander Mobutu Sese Seko.
During the crisis, CIA officer Larry Devlin warned in a cable that there might be little time left to act to prevent what he feared could become “another Cuba,” even though he admitted uncertainty over whether Lumumba was truly a committed communist. Lumumba was eventually captured and killed in 1961 with the involvement of Belgian authorities and Congolese collaborators, ending his brief tenure as prime minister.
The aftermath proved devastating for the country. Mobutu later seized power and ruled for more than three decades, presiding over a regime widely criticized for corruption, repression, and economic mismanagement. His overthrow in 1997 triggered another cycle of violence that expanded into one of the deadliest conflicts since the Second World War, claiming millions of lives across Central Africa.
Today the Democratic Republic of Congo remains plagued by armed conflicts, humanitarian crises, and political instability, conditions many observers link to the unresolved legacy of the early post-independence power struggles.
As global tensions surrounding Iran continue to dominate international headlines, these historical episodes are increasingly cited by analysts who argue that regime change efforts rarely unfold as planners expect. Supporters may envision swift political transformation, but critics say the reality often involves prolonged instability and unintended consequences that reverberate for generations.
The current debate among Iranian communities abroad reflects that tension. While some view external pressure as the only path to dismantling authoritarian rule in Tehran, others warn that history offers sobering lessons about the risks of foreign intervention and the uncertain future that can follow the collapse of a government.
For many observers, the past interventions in Chile, Libya, and the Democratic Republic of Congo serve as reminders that the promise of liberation through regime change has often collided with a far more complicated and tragic reality.