A long time ago
in a galaxy far far away
a rag-tag band of rebels are holding out against the imperial might of a vastly superior force that has invaded their impoverished homeworld
They cannot hope to win an outright victory. They cannot even hope to repel the invaders from their land. But if they hold out long enough, the military adventure will lose popularity at the imperial court, and a more moderate vizier may gain ascendancy in the distant courts of power.