It is really happening now.
Weapons are live from the US already in Ukraine with the new systems working well already:
https://kyivindependent.com/patriot-arrives-in-ukraine/
Proven training on them shows it worked.
The fact they are being used to effect already shows the US got it right in Ukraine. Other countries can rest assured now as the weapons are the most important thing to stop war, work per the above, and are the number one way to end war and create a more united front for the planet.