In 2394 (equivalent to Tiamat’s Wrath), Laconia came out of exile 6 years ago, and there are 280 pulsar-class fast destroyers. In PR, Bobbie says that the Storm has 200 to 250 marines in power armor. This means 56,000 to 70,000 marines are station on pulsar-class destroyers (the only problem being the destroyers could be under crewed or that the storm was over crewed). There are 5,000 original colonists on Laconia, and Gewitter base in Bara Gaon system has nearly 7,000 permanent officers and personnel. So probably at least 78,000 to 82,000, because they still need crews for all the ships. Keep in mind, I’m only counting people born on Laconia, and maybe a few Laconians that were born on Gewitter Base of Medina Station (I’m assuming they still have children). According to Dark_Ops16, in the show 10 ships made transit with 1,700 personnel.