Constrained, forced, necessitated: see the verb.

Enlisted; compelled to serve.

That is or has been conscribed (in various senses of conscribe, v.).

Forced to enlist in, or seized for use in, military, royal, or public service. In later use also more generally: forced do something against one's…

Of a conscript: selected by lot. Cf. lot, v. 3c. Obsolete.

Forced to enlist in the armed services; recruited by conscription. Also: formed by or based on conscription. Cf. conscripted, adj.

Forced to enlist in the armed services; recruited by conscription. Also figurative and in extended use.

That has been forcibly enlisted into military service; that has been forced to do something.