How much money did each country spend on World War 1?

The exact amount of money spent by each country on World War 1 is difficult to determine with precision, as the conflicts began more than a century ago, and financial records may not be readily accessible or fully preserved. However, historical estimates and economic analyses provide a general sense of the scale of financial investments made during the war. While the figures cited may differ slightly based on different sources and methodologies, here are some estimates of the expenditures by major countries involved in World War 1:

1. United States: The United States entered the war in 1917 and incurred significant costs. According to the Congressional Research Service, the direct U.S. expenditures for World War 1 between 1917 and 1918 amounted to approximately $33.4 billion, or $509.5 billion in 2018 dollars when accounting for inflation.

2. United Kingdom: The United Kingdom, a major belligerent throughout the war, faced substantial financial burdens. Estimates suggest that the UK's total war expenditures between 1914 and 1918 amounted to roughly £9 billion, which is equivalent to approximately £788 billion in today's currency (2015 prices).

3. France: France was heavily involved and severely affected by the war, enduring some of the most intense fighting. Various sources estimate that the total cost of the war for France amounted to around 200 billion gold francs, which is equivalent to approximately €2.3 trillion in today's terms (2013 prices).

4. Germany: Germany was one of the Central Powers and incurred substantial costs in pursuit of its war effort. Estimates place Germany's total expenditures during the war at around 185 billion gold marks, equivalent to approximately €1.7 trillion in 2013 euro values.

5. Italy: Italy joined the Allied Powers in 1915 and also bore a significant financial burden. Estimates indicate that Italy spent approximately 55 billion lire during the war, which is equivalent to around €200 billion in today's currency (2008 prices).

It's worth noting that these figures are ballpark estimates based on available data and may vary slightly depending on the source and methodology used for calculations. Additionally, other countries involved in the war, such as Russia, Austria-Hungary, Japan, and others, also incurred substantial costs, although their expenditures are relatively more challenging to quantify precisely.