Hactivists say they hacked Belarus rail system to stop Russian military buildup

Hacktivists in Belarus said on Monday they had infected the network of the country’s state-run railroad system with ransomware and would provide the decryption key only if Belarus President Alexander Lukashenko stopped aiding Russian troops ahead of a possible invasion of Ukraine.

https://arstechnica.com/information-technology/2022/01/hactivists-say-they-hacked-belarus-rail-system-to-stop-russian-military-buildup/

How effective could a similar kind of attack be on a rail network in the US/UK/ etc? Are all countries equally vulnerable?

belarus hacked military privacy russian system