I had just taken on a quest which had as its first objective, "Meet 'X' in 'location' at 'time' tomorrow." (Notice how I'm trying to avoid giving any spoilers...) Said time was less than 24 hours away. At the exact same time, I was notified that I needed to help defend the Slog. "Crap," I thought. "This is a no-win scenario. I can't possibly get from here to there, fight, and get back again within a day." So I killed time and performed the quest, all the while expecting to see a notice that the Slog had fallen. A day passed, then another. I checked the map. The Slog was still happy. "Hmm," thought I. "Those 4 turrets I installed must have done the job."
I went about my business and finished the quest, which had more parts, with some exploring and killing on the side. Imagine my surprise, a day or two later, when I was notified that I failed to defend the Slog!!!
Exactly how long does one have to defend a settlement, from the time one is notified that there's a problem? Because I've always found that, as soon as I showed up, there was an attack. So I presumed that if I didn't leave right away, I was going to fail- and pretty much right away. But- leaving right away would mean that my quest was doomed, too. So, it was a "damned if you do, damned if you don't" situation, right?
Or am I missing something? If I had completed my quest as fast as possible, could there still have been time to defend the settlement? (Which, BTW, still exists- population 1, but it still, y'know, exists. I'll get some more settlers from somewhere. The Soviets got settlers for Siberia, so I can get settlers for the Slog.)