War's True Cost: Hidden Debts and Enduring Obligations

The true cost of war isn't paid in daily headlines, but in the compounding debts and enduring obligations that stretch for decades, often hidden from public view. This conversation reveals how initial estimates of conflict expenses are merely the tip of an iceberg, obscuring massive, long-term financial and environmental burdens. Anyone involved in strategic planning, budgeting, or public policy needs to understand these hidden consequences to avoid the pitfalls of underestimation that have plagued past conflicts. By grasping the systemic nature of war costs, leaders can gain a significant advantage in resource allocation and long-term fiscal responsibility.

The Unseen Bill: Why War's True Cost Is Always Underestimated

The immediate costs of war, the bombs dropping and planes flying, are often the only figures that make the daily news. But as Mark Cancian, a retired US Marine Colonel and former Department of Defense budget advisor, points out, these visible expenses are just the beginning. Even the munitions used aren't always accounted for in the current budget, requiring immediate requests for supplemental funding. This isn't just a minor accounting oversight; it's a systemic issue where the immediate needs of conflict bypass established budgetary processes, creating an immediate financial shock that doesn't reflect the true, ongoing expenditure.

"The bombs -- the bombs! -- are not totally priced in."

-- Mark Cancian

This immediate need for replacement munitions, regardless of the war's duration, highlights a critical flaw in how war costs are initially assessed. The system is designed to react to immediate demands, not to forecast the full lifecycle of expenditures. While Cancian notes that daily costs might decrease once air superiority is established, allowing for the use of cheaper munitions, this perspective still focuses on the operational phase. It doesn't grapple with the enduring obligations that follow.

Linda Bilmes, a public finance professor at Harvard Kennedy School, warns that this underestimation is a historical pattern, echoing the optimistic, yet flawed, projections made for past conflicts like the Iraq War, which was initially estimated at $50 billion. The reality, as Neta Crawford, co-founder of the Costs of War Project at Brown University, estimates, is closer to $3 trillion for the Iraq and Syria wars alone. This staggering difference isn't just about inflation or unforeseen circumstances; it's about a fundamental misunderstanding of the "long-term expenses" of going to war.

The Hidden Trillions: Veterans' Care and Environmental Debt

The most significant of these long-term costs, as highlighted by Crawford, are the expenses related to veterans' care. Tens of thousands of service members are involved in current conflicts, and the commitment to their well-being extends far beyond the battlefield. Bilmes states that the US is already paying billions annually for veterans of the relatively short Gulf War. This commitment includes not just healthcare but also accrued disability benefits. The sheer scale of these promised payments is immense: $7.3 trillion in disability benefits alone, money already owed to veterans for injuries or illnesses sustained during service. This isn't a future projection; it's a present obligation that compounds over decades, a direct consequence of military engagement that is rarely factored into initial war cost estimates.

"Our total obligation to veterans who have been hurt by war is in the trillions."

-- Linda Bilmes

Beyond the human cost, Neta Crawford introduces another critical, often overlooked, long-term expense: the environmental impact of military operations. The Department of Defense's 2024 military emissions alone were 47 million metric tons of CO2 equivalent, a figure larger than many countries' annual emissions. This includes the energy-intensive operations of aircraft and ships, as well as the direct environmental damage from strikes on oil facilities. Bombing oil infrastructure, regardless of who claims responsibility or who initiates the strike, creates lasting environmental degradation. This environmental debt is a consequence that future generations will inherit, a cost entirely absent from the immediate wartime budget.

The Debt Spiral: Financing War Through Borrowing

Perhaps the most profound systemic shift in financing war, according to Bilmes, occurred after 9/11. Unlike previous conflicts, which were financed through a mix of debt, taxes, and budget cuts, modern American wars are funded almost entirely through debt. This approach, while perhaps politically expedient in the short term, shifts the burden to future generations and diminishes public buy-in. Mark Cancian, referencing economic theory, suggests that financing through debt or taxes might be an "economic wash." However, Bilmes strongly disagrees, asserting that the public experiences costs differently when taxes are raised versus when debt is incurred.

President Truman's approach, emphasizing that a war worth fighting is a war worth paying for through taxes, fostered a direct connection between public sacrifice and military action. By financing wars through debt, this connection is severed. The immediate impact is less visible to the taxpayer, allowing for potentially larger military budgets and prolonged engagements. Bilmes worries that this debt-financed approach, coupled with the backdrop of ongoing conflict, enables presidents to secure significant increases in defense spending.

"Once that gets added into the Pentagon's annual budget, it stays there pretty much forever, so that every year you have a higher base that you start from."

-- Linda Bilmes

This creates a dangerous feedback loop: the perceived lower immediate cost of debt-financed war leads to higher overall spending, which then becomes a permanent fixture in the defense budget. The "base increase" to the Pentagon's budget, once established, is incredibly difficult to reduce, even if the initial justifications for increased spending fade. This systemic inertia means that the financial consequences of war continue to mount, long after the conflict itself has ended, creating a perpetual cycle of higher spending and accumulating debt. The chaos of war, precisely what makes economic figures uncertain, also makes these long-term costs incredibly difficult to contain.

Key Action Items

• Immediate Action (Next Quarter): Re-evaluate immediate war cost estimates by incorporating a line item for "unbudgeted munitions replacement" and "immediate environmental remediation of strike zones." This forces a more realistic immediate financial picture.
• Immediate Action (Next Quarter): Establish a dedicated, independently audited fund for projected veterans' healthcare and disability benefits based on current deployment numbers, rather than relying on ad-hoc congressional appropriations.
• Immediate Action (Next Quarter): Mandate standardized reporting of military environmental impact (emissions, habitat destruction) for all active operations, mirroring civilian environmental impact assessments.
• Longer-Term Investment (12-18 Months): Develop a framework for estimating the long-term interest payments on war-related debt, explicitly factoring this into budget proposals.
• Longer-Term Investment (18-24 Months): Initiate a multi-year study to quantify the downstream economic and social costs of environmental damage caused by military actions.
• Discomfort Now, Advantage Later (Ongoing): Advocate for a return to tax-funded war financing to increase public buy-in and accountability, understanding this will likely face significant political resistance.
• Discomfort Now, Advantage Later (Ongoing): Implement stricter controls on Pentagon budget base increases, requiring a higher threshold of justification for permanent additions to annual spending, even during active conflicts.