Goods and services from warring countries often become inaccessible and friendly countries' goods and services get spent on materiel. Money is just an abstracti

Goods and services from warring countries often become inaccessible and friendly countries' goods and services get spent on materiel. Money is just an abstraction. The world's resources decrease in a very real way. Inflation just mirrors this onto the abstraction. (Although inflation can be caused by other things as well.)