If USA involves itself in any Taiwan action this can happen…

If USA involves itself in any Taiwan action this can happen there too: "Within hours after these initial local reports, air travel monitoring sites said that Russia's domestic airlines halted all sales of tickets abroad to Russian men aged 18 to 65; however, these can reportedly have a waiver from the Ministry of Defense."
Akin to drafts in WW2.
WW3 at increasing risk of beginning.

https://www.zerohedge.com/geopolitical/russia-moves-restrict-travel-young-men-flights-abroad-sell-out-after-partial