Years ago the muppets took a base deep in bish country that I NOE'd a goon 6 sectors to deliver the troops. They kept that base until everyone on the knights got bored and went to bed. About 6 hours worth.
It happens about once a year on this scale. It's worse for that country when the HQ is only a sector away or the City. But, I've never seen it as a weekly or even once a tour thing. It's random and incredibly irritating for the country with their nikkers down. The country that captured it has a blast for that evening. In the end, if you want that base back, carpet bomb it with 6-10 boxes of Lancs until everything is flattened including the town 10x over. With no resupply other than the system cycle, run a constant bomber stream over the base until it and all the GV's are flattened.
Seems people would rather whine in here than mount up a giant bomber effort and put an end to their pain in a single finger salute.