> did they "default" on their side of the treaty?

I'm pretty sure they all answered the call when the US invoked Article 5 after the 9/11 attacks, no?

> The US has paid 65 to 70% of the total of $1.4 to 1.5T/year from 2018 to 2025.

Are you suggesting that the US has paid over $1 trillion into NATO each year? That would be difficult because the US military budget has never crossed $1 trillion. The DoD budget is going to be $900.6 billion in FY2026. [0]

[0] https://www.meritalk.com/articles/senate-passes-fy26-defense...