last resource

Not less so is the barrenness of this country, which was formerly and usually the last resource.

"As a last resource your good advice may guide me, Monsieur le Seneschal," said he.

The next moment he understood what the last resource was the two men were going to fall back upon.

Brigandage may be, and not infrequently has been, the last resource of a people subject to invasion.

His last resource was an attempt to seduce the loyalty of the besiegers.