According to the Wikipedia article on Territorial spirit:
Territorial spirits are national angels, or demons, who rule over certain geographical areas in the world, a concept accepted within the Charismatic movement, Pentecostal traditions, and Kingdom Now theology. This belief has been popularized by the novel, This Present Darkness by Frank Peretti, as well as by the ministry of Peter Wagner. The existence of territorial spirits is viewed as significant in spiritual warfare within these Christian groups.
Peter Wagner promotes "Strategic-Level Spiritual Warfare" (SLSW) which involves the practice of learning the names and assignments of demonic spirits as the first step to effective spiritual warfare. Opponents of this theological construct, and associated beliefs in "spiritual warfare", point out that while the Bible may describe some form of demonic control over geography, it does not prescribe many of the behaviors and teachings that proponents advocate in response. There is no mention in either the Hebrew Bible or the New Testament of believers banding together and praying a form of "spiritual warfare" against particular territorial demons. The battles occurring in the spiritual realms (as described in Daniel 10) have no Biblically identified link to the actions and prayers of God's people in the physical world.
Are the belief in "territorial spirits" and the practice of "Strategic-Level Spiritual Warfare" innovations of the Pentecostal/Charismatic movement?
Did they borrow these ideas from prior sources?
Can we find evidence of similar beliefs being held in other periods of church history?
Note: an interesting book that reports the alleged application of these ideas in the context of the Argentine Pentecostal Revival is Listen to Me, Satan! by Carlos Annacondia (an interview is available at Carlos Annacondia: The evangelist at the forefront of revival, and a YouTube documentary called Carlos Annacondia - "Listen to Me Satan").