I'm counting long borders as borders between country A and multiple other countries, with a focus on notable security issues[1] related to borders. One timely

I'm counting long borders as borders between country A and multiple other countries, with a focus on notable security issues[1] related to borders. One timely example might be Ukraine, with the Belarus/Russia border, where Belarus is a proxy for Russia. 1. Contraband, espionage, aggression, anti-proliferation, proxy attacks, etc etc.