­If estab­lishment terrorism follows a top-down model, then revolutionary terrorism is the bottom-up version (though it's sometimes sponsored by foreign states). The two models often share a codependent relationship, with a repressive government using terror to combat terrorist forces, each fanning the other's fires. For instance, the Roman Empire and the rebellious Jewish Sicarii waged wars of terror against each other during the first century A.D. over occupied Judea.Just as establishment terrorism often arises when more lenient forms of keeping law and order fail, so too does revolutionary terrorism become an option when a military victory isn't possible. Rebellion can take different forms. On one extreme, you can field an army against adominant government if you have the resources. If you're outmatched, however, other methods are available.