What armies in the world kidnap?

You never heard of armies capturing other soldiers? Did you learn warfare from playing “Risk”?

Attacks on soldiers is not terrorism in contrast attacks on police can be considered terrorism.

This is the US govt’s definition of terrorism for what it’s worth:

http://www.nctc.gov/site/other/definitions.html

Terrorism: Premeditated, politically motivated violence perpetrated against noncombatant targets by subnational groups or clandestine agents.

Armed soldiers on military duty of course are not noncombatants are they?