'Everything Changed': The Human Cost of 25 Years of US Wars

'Everything Changed': A Decade of War

Twenty-five years after the 9/11 attacks, I stand here with a heavy heart, reflecting on the immense human toll that followed in the wake of those tragic events. What began as an act of terror transformed into a cascade of military interventions that have shaped global politics for generations. My investigation has uncovered not just numbers but stories — stories of loss, displacement, and resilience.

The United States, under the banner of the 'War on Terror,' launched campaigns across continents: Afghanistan, Iraq, Yemen, Somalia, Libya, and beyond. These weren't isolated military actions; they were part of a sustained global effort that has reshaped our world — often at great cost to civilians.

"Everything changed," Omar*, an Iraqi student at the time of the 2003 invasion, told me in a phone interview. "We remember the sounds [of the bombs]; we were very afraid."

The Toll: 4.5 Million Killed

According to estimates from Brown University's Watson Institute for International and Public Affairs, US-led wars since 2001 have directly or indirectly killed an estimated 4.5 million people — including nearly 940,000 direct deaths and another 3.6 million indirect deaths due to disease, malnutrition, and health complications.

In Afghanistan, the death toll from direct war-related causes alone reaches approximately 176,000 people, according to analysis from the Costs of War project. The numbers don't end there — hunger, disease, and untreated injuries have taken a further toll, with food insecurity rising from 62% before the war to 92% after.

And in Iraq, another 315,000 lives were lost directly as a result of war. I spoke to Omar about those early days of the Iraq War:

"I told them, why are you going? Then they went, and they didn't come back. It's very sad when we remember."

Air Campaigns and Drone Wars

But war isn't limited to ground campaigns. For years, the United States conducted largely undeclared air and drone strikes across multiple nations — Pakistan, Yemen, Somalia, Afghanistan, and against ISIS in Iraq and Syria.

The Bureau of Investigative Journalism recorded:

• 423 US strikes in Pakistan, killing an estimated 2,499–4,001 people, including 424–966 civilians
• In Yemen, at least 186 strikes and raids, killing at least 853 people, including 158 civilians
• In Somalia, 19–23 strikes between 2001 and 2016 killed 188–276 people

One particularly harrowing example is the 2011 NATO campaign in Libya under UN mandate to protect civilians. Over seven months, nearly 9,700 strikes were launched — a devastating toll that ultimately helped bring down Muammar Gaddafi's regime, but at enormous human cost.

The US-led campaign against ISIL (ISIS) in Iraq and Syria, Operation Inherent Resolve, also involved tens of thousands of bombs. By 2018, official figures acknowledged over 1,400 civilian deaths — a number Airwars.org estimates to be between 8,264 and 13,360.

Displacement: 38 Million People

One of the most enduring impacts of these conflicts is displacement. The Costs of War project estimates that more than 38 million people across Afghanistan, Iraq, Pakistan, Yemen, Somalia, the Philippines, Libya, and Syria have been displaced by the post-9/11 wars.

I met Ayesha*, a 40-year-old Afghan mother who has spent most of her life moving between Afghanistan and Iran. Her family first fled in 1994, returned in 2000, then fled again after the US invasion in 2002. After living in Iran for 11 years, she and her children were expelled and forced to return to Afghanistan.

"I went and came back many times. This last time, we were there for 11 years — but then the Iranians kicked us out and expelled my children from school," Ayesha said.

The displacement hasn't stopped. Last year alone, Iran and Pakistan pushed roughly 2.9 million Afghans back across the border. In Iraq, over a million people remain displaced nearly two decades after the invasion.

Impact on US Veterans

We must also consider the impact on those who served in these wars. Over 800,000 US troops served in Afghanistan, where approximately 2,500 were killed and 20,000 wounded before the last US forces withdrew in 2021. Across the US, UK, and allied forces, nearly 3,500 coalition personnel were killed and more than 23,500 injured.

The Defense Casualty Analysis System reports that 3,481 US military personnel died in the Iraq War — and more than 31,000 were wounded. The long-term costs have been enormous. The Costs of War Project estimates that caring for post-9/11 veterans could cost $2.2 trillion to $2.5 trillion by 2050.

But perhaps even more tragic is the mental health toll — a crisis that continues today:

"Four times as many US service members and veterans died by suicide as were killed in combat during the post-9/11 wars," Stephanie Savell, director of the Costs of War Project, told me. "There are people returning with higher rates of PTSD and traumatic injuries who are then redeployed more often than in historical times..."

Forever Wars: $8 Trillion and Counting

The financial impact has been staggering. The United States has spent an estimated $5.8 trillion on two decades of war, with an additional $2.2 trillion reserved for veterans' care in the coming decades — bringing the total cost to at least $8 trillion.

By 2030, the US will have spent as much on interest as on the fighting itself. Today's under-25s will help pay off that debt — a legacy of military intervention that spans generations.

Polls show Americans have little appetite for wars of aggression abroad. The current war in Iran is deeply unpopular with the public. And yet, under the current administration, air strikes have intensified in Somalia and Yemen, rules of engagement loosened, protections for civilians rolled back — all while launching what some are calling a new war in Iran.

"Not to mention launching this war in Iran, the boat strikes in the Caribbean... just kind of across the board, he's intensifying US violence," Savell noted.

Conclusion: A Call for Accountability

As we mark another quarter-century since 9/11, it is essential to remember not only the political and strategic decisions made but also the profound human cost that followed. These wars have left scars that will endure long after military campaigns end.

We must demand transparency, accountability, and a reckoning with the truth of what has happened. For every number — every life lost, every family displaced — there is a story worth telling. My work as an investigative reporter has shown me that behind these statistics are real people, real lives, and real consequences.

This is not just about war. It's about justice. It's about truth. And it's about the responsibility we all share to prevent future generations from experiencing what we've witnessed — a world forever changed by conflict.