The sums are vast, but the explanations for the spending range from vague to inscrutable. Consider these items in the law that funded the Department of Defense this year:

For “Other Procurement, Air Force”: $32.6 billion. For “Research, Development, Test and Evaluation, Defense-Wide”: $35.2 billion. And for “supplies and associated support services” related to U.S. Code Title 10 Section 3601 subsection(c)(3)(B) clauses (i) through (iv): a mere $650 million.

Determining what, exactly, all this public money is paying for requires cross-referencing thousands of pages of financial tables, accounting records and congressional committee documents that will leave all but the most determined budgeting sleuth at a loss. Yet this is how the U.S. government explains its funding decisions for the most expensive military in the world. And the cost is growing.

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