I believe the Hyperion (the most common ship at the time) had a crew of about 100 to 120.
About the casualty numbers - as far as I thought the colonies, even major ones, only have a population roughly 1 or 2 million at the time of the show. Fifteen years earlier they'd be smaller still. As such 250,000 may well have comprised a large proportion of Earths spaceborn population. Plus I always thought Earths military was almost wiped out during the war. More like 98% casualties than 90%.
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About the casualty numbers - as far as I thought the colonies, even major ones, only have a population roughly 1 or 2 million at the time of the show. Fifteen years earlier they'd be smaller still. As such 250,000 may well have comprised a large proportion of Earths spaceborn population. Plus I always thought Earths military was almost wiped out during the war. More like 98% casualties than 90%.