all guns blazing
Forcefully and with all of one's energy and a strong sense of urgency or purpose, especially when directed at an argument or problem that has angered or frustrated one. The senator started the press conference all guns blazing, forcefully denying the accusations and painting his accusers as pathological liars. The home team fell behind by a large margin in the first half, but you can expect them to come out all guns blazing in the second half.