Hopefully the US/NATO is secretly training and arming future Ukrainian guerrilla groups.
There are both Canadian and US special forces on the ground in Ukraine doing training, so that's not so much a "hopefully is" and more of a "currently are and have been".
https://coffeeordie.com/usaf-ukraine/US forces have been training Ukrainian troops since 2015 at a base near the western Ukrainian town of Yavoriv. And US special operations forces from various branches have conducted other training for Ukrainian forces at sites across the country. However, US military forces are not involved in the ongoing war against Russia in the east.
https://globalnews.ca/news/8517110/canada-special-forces-ukraine-russia“(The Canadian Special Operations Forces Command) is part of the broader Armed Forces’ efforts to support Ukraine’s Security Forces,” wrote Maj. Amber Bineau, a spokesperson for special operations command, in a statement to Global News.
Bineau noted that Canadian special forces have been providing training, as well as “instructor and leadership expertise,” to Ukrainian counterparts since 2020 — although sources told Global News the latest special forces contingent, which left for Ukraine around Jan. 9, is not conducting training.