It started in Heaven.
Satan (also called Lucifer before his shameful fall) and his angels he deceived waged a war in heaven to overthrow the Most High, the Lord God Almighty. Rev.12:7-12, Isa 14:12-17, Ez. 28:12-19.
He Lost that war and was cast out of Heaven.
After creation of the earth he took the war to Adam and Eve in the garden of Eden, because it was the only available front he could continue waging his war against God. He deceived man to believe in another interpretation of the word of God that was different but so close to the truth, which ONLY the Holy Ghost teaches. Gen. 3:1-6.
Therefore man temporarily lost a battle to defend the establishment of God's kingdom on earth, but not the war.
This war continued down through the ages in various forms including manipulating man to remain rebelious against God.
Jesus Christ the Lord God Almighty defeated him by His death on the cross of Calvary, and by His triumphant resurrection.
He disarmed Satan and made him a footstool of His body, which also is the church. He next gave unto the church all power to tread upon the enemy and all his evil works.
But the church has become a lukewarm and allowed Satan to be on the loose. He has now appointed and enthroned Mammon
as a god within the church. Sadly the church has gladly accepted and embraced him, and has kicked Jesus out, leaving Him knocking at the door. Rev. 3:20
Mammon has fattened the church with heavy material wealth that comes with wonderful incurable diseases. But spiritually, Jesus warns the church has become wretched, miserable, poor, blind, and naked. Rev. 3:17.
The war is now at the stage where we fight to:
wake the church up from lukewarmness,
cast Satan and his Mammon out and restore them as our footstool,
destroy their works and free their captives,
restore and establish the kingdom of God back in the church, and
preach the gospel unto all creation.
This war shall be finally over on that day when Satan, his angels, and all whose names are not written in the Lamb's
book of life shall be cast alive into the lake of fire burning with brimstone. Rev. 19; 21:15.
"... I came not to send peace, but a sword." Matt. 10:34