Infrastructure 101, the Commune Information Node, then power. By 16:00 you have a local hub that serves without internet, a network people can join to reach it, and a node that comes back on its own after you pull its power out — and you know what it takes to run it off a panel.
The capstone is the pull-the-plug test. Everything before it builds toward it; everything after it is about surviving the field.
Times drift. These blocks are deliberately coarse. Trust what Liz says over what this page says.