Counterattack
Counter Offensive
noun, verbal noun
Anti aggression is when you receive some aggression, then respond to it with anti aggression, aka your counterattack.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
これと同時に、ソ連が反攻を開始しました。
At the same time, the Soviet Union launched a counter-offensive.
1944年に連合軍は反攻に転じました。
In 1944, the Allied forces shifted to a counteroffensive.
もちろん我が軍は、反攻を準備している。しかし、まだ準備が整っておらず、反攻を行うことができない状況にあるのだ。
Of course, our army is preparing for a counter-attack. However, we are not yet ready and are in a situation in which we cannot launch a counter-attack.