This verse in Revelation is talking about what happened on the cross, the conflict, the battle between his righteous Spirit and his unrighteous flesh, his “personal Armageddon”. This is also when satan or the devil was kicked out of heaven. (Lost his place in the “high places”) This is the result of Jesus having come “to destroy the works of the devil”. This is where when and how he did it. The power of the accuser was overthrown.
[True “will” power can only come from true love, since only love is true reality]