COMPULSION, noun [Latin , See Compel.]

1. The act of driving or urging by force, physical or moral; force applied; constraint of the will; the application of a force that is irresistible.

If reasons were as plenty as blackberries, I would give no man a reason on compulsion

A man is excused for acts done through unavoidable force and compulsion

2. The state of being compelled or urged by violence.