Top 10 most expensive wars

As of today:

1. Second World War (25-30 trillion USA dollars in modern worth)
2. First World War (5-6 trillion USA dollars in modern worth)
3. USA-Iraq war (2.9 trillion USA dollars)
4. Vietnam war 1955-1975 (2.4 trillian USA dollars in worth today)
5. USA-Afghanistan war (2.3 trillion USA dollars)
6. USA war on drugs 1975-2025 (1.8-2.2 trillion USA dollars)
7. USA war on terror exclusive Iraq and Afganistan (1.5-1.8 trillion USA dollars)
8. Rusland-Ukraine was (700-900 billion USA dollars)
9. Korean war (625 billion USA dollars)
10. Syrian civil war (400-600 billion USA dollars)