I've been enjoying playing through Feitan's missions so far, but the mission "To Crew an Airfleet" says it requires marines. I've looked through the recruitment options and decisions and I can't get any marines--is this referring to the marines from Rule Britannia/Golden Century? If so, those DLC should be listed on the main page as required, or the focus should be patched to not require those units if you don't have those DLC enabled.