As Vellos says, strategic secession is loosely and unofficially described as splitting your realm to get an advantage during time of war, or in preparation for war. It is usually an attempt to get around the OOC restriction of recruiting only in the capital. You can't have a "strategic secession" while you're not at war.
So the official policy is based on an unofficial definition of strategic secession that can be found no where on the rules and policies page yet is expected to be abided by according to that definition?
