Ukraine

The poor US military has only over 100 left that are sitting idle.

Citation needed. In 2022 the US had 50 Batteries spread between 16 Battalions. It's pretty unlikely we've more than doubled that number in the last 18 months, let alone built that many just to have them sitting around doing nothing.

The damn things cost 1.1 Billion each to build plus another 690 Million to fully load for a combined total (each) of something like 1.7 Billion dollars or 170 Billion dollars for 100 of them. There's no way the US Army, which is who operates the Patriots, fit that into their 2023 Budget. It's simply not possible.

You never know when the Canadians invade!