This month marks five years since the United States completed its withdrawal from Afghanistan, ending a nearly two-decade military engagement initially launched in response to the September 11, 2001 attacks. The NATO-backed invasion aimed to dismantle al-Qaida and remove the Taliban from power but ultimately culminated in a costly and widely criticized occupation. More than 2,400 U.S. and 450 British military personnel died during the conflict, alongside tens of thousands of civilians, though precise figures remain uncertain. Following the U.S. exit in 2021, the Taliban swiftly regained control, reinstating its strict Islamist rule.

The Afghanistan intervention is often cited as a cautionary example of protracted foreign engagements lacking clear objectives or exit strategies, frequently described as a "forever war." Yet, despite these lessons, parallels are emerging in current U.S. policy, especially following former President Donald Trump’s decision to initiate military actions against Iran. What Trump referred to as a “little excursion” has now extended into its sixth month, with tensions escalating and no clear resolution in sight, generating concerns about another open-ended conflict.

Experts attribute such recurring patterns to a combination of overstated security threats, national hubris, and political motivations. Carter Malkasian, a National War College professor who advised U.S. forces in Afghanistan, argued that the central justification for the extended deployment in Afghanistan—preventing the country from becoming a terrorist safe haven—was flawed. He noted that in the five years since withdrawal, no terrorist attacks against the U.S. have originated from Afghanistan. The U.S. spent approximately $1 trillion and deployed over 775,000 service members, combating a threat that did not materialize as expected. Malkasian warns of the danger of collective amnesia overshadowing the high costs of endless military engagement.

Similar miscalculations were evident in the 2003 U.S.-led invasion of Iraq, justified by intelligence claims about weapons of mass destruction and alleged ties to al-Qaida that were later proven false. The prolonged occupation and resulting insurgency contributed to an extended “global war on terror” that reshaped U.S. foreign policy for years.

In current conflicts, critics point to a recurring theme of exaggerated threats, particularly regarding Iran. Despite strong rhetoric from Trump and Israeli Prime Minister Benjamin Netanyahu, no concrete evidence has emerged suggesting that Iran possesses nuclear weapons or is actively seeking them. The emphasis on perceived existential threats is seen by analysts as part of broader American insecurities and ambitions for geopolitical influence. Trump’s confrontational posture toward countries in Latin America and his economic goals also highlight a blend of security and financial interests driving U.S. foreign policy.

The degradation of diplomatic avenues, diminished U.S. leadership at the United Nations, and a persistent refusal to reconcile with the realities on the ground have all contributed to the increasing intractability of these conflicts. Observers note that Trump’s personal stake in maintaining a hardline stance, even at the cost of civilian casualties and prolonged violence, further complicates prospects for peace.

As the situation intensifies, Iran’s hardline factions appear to capitalize on the discord, escalating militia attacks and strikes that have destabilized regional and global markets. Attempts to resolve the conflict through military force or negotiations remain elusive, raising concerns about long-term consequences.

The enduring pattern of indefinite warfare underlines the risks and moral challenges faced by policymakers, highlighting the complex interplay of strategic misjudgments, political agendas, and human cost that define contemporary U.S. military engagements.