The apostle Paul, in his many letters, does use references related to human warfare as symbolic of what must be done in the spiritual realm (2Corinthians 10:3 - 5, 1Timothy 1:18, etc.).
Paul defines spiritual warfare as composed of two parts. First, true believers have an ongoing war within themselves between their self-defeating human nature that leans toward sin and the influence of God's Holy Spirit that guides a Christian toward righteousness (Romans 7:21, 23).
The second part of Paul's spiritual warfare refers to refuting false teachings and 'bringing into captivity every thought into the obedience of Christ' (2Corinthians 10:5).
Charismatics, however, have a different version of what it takes to battle in the spiritual realm. For them, combating evil involves over-the-top affirmations by a religious leader, where countless audience members declare they possess the power to constrain Satan or his demons in a city. This type of strategy is sometimes referred to as "spiritual mapping."
Bill Randles, in his book enetitled "Making War in the Heavenlies: A Different Look," takes a critical view of some of the tactics used by those who engage in spiritual warfare. He reveals the steps some take to 'free' a city from the bondage of an evil entity.
According to Dick Bernal, the way to take a city is fourfold. 1. Proclaim a fast with prayer. 2. Identify the principality (e.g. the evil spiritual entity that rules) over the city. 3. Determine its (the evil spirit's) geographical location. 4. Call him or her by name.