In November, a train carrying almost 500 people came to a sudden halt in eastern Poland. A broken overhead line had smashed several windows, and the track ahead was damaged. Elsewhere on the line, explosives detonated under a passing freight train. No one was hurt in either case and the damage was limited, but Poland, which blamed the attack on Russia’s intelligence services, responded forcefully: It deployed 10-thousand troops to protect the country’s critical infrastructure. The sabotage in Poland is one of 145 incidents in an Associated Press database tracking what Western officials say is a campaign of disruption across Europe masterminded by Russia since President Vladimir Putin’s invasion of Ukraine in 2022.