Gavin decided that the best form of defence was attack.

Get your retaliation in first, attack is the best form of defence.

He had no weapon nor any other form of defence.

Do you know the saying, that the best form of defence is attack?

It has been predicted that, with further study, other species will also be shown use this form of defence.

The best form of defence is always attack, isn't it?

It seems that for the Apple faithful, attack has become the best form of defence.

Many insects carry chemical weapons as a form of defence.

Apparently the automatic installation was coming up with a new form of defence.

It can be used as a form of attack or defence.