You were dead because of your sins and because your sinful nature was not yet cut away. Then God made you alive with Christ, for he forgave all our sins. He canceled the record of the charges against us and took it away by nailing it to the cross.In this way, he disarmed the spiritual rulers and authorities. He shamed them publicly (Truimphantly)
by his victory over them on the cross.

Col 2 v 13-15

The victory to spiritual warfare depends on who fights for you and what has already been won for you by Jesus Christ’s blood sacrifice on the cross.

The word triumphant one or Triumph signifies a total complete public victory. In Ancient Roman generals were made triumvir after a conquest, they would enter a city on a white horse and behind them, they would parade the evidence of their conquest (slaves,stock of exotic animals…