war expenditures; war costs
Refers to the financial cost of conducting a war, including military operations, equipment, and related expenses. Often used in historical, political, or economic contexts.
The allied nations bore part of the war costs.
Raising war funds put pressure on the national finances.
この戦争の戦費は膨大な額に上った。
The war expenditures for this conflict reached an enormous amount.
政府は増税で戦費を捻出した。
The government raised war funds through tax increases.
As the war dragged on, the war costs kept mounting.
The nation poured enormous sums into the war effort.
軍費 is a somewhat old-fashioned synonym for war/military expenses that overlaps closely with 戦費 but is less common in contemporary Japanese.
Compound of 戦 (war) and 費 (expense, cost).