Each village/town/city in Overthrow has a current "support" level. This is split into two numbers:
Tip: It is very difficult to raise "support" higher than the "support modifier"
= population supporting / total population % (easier to shift in small towns/villages)
Raising support
+ Put up recruitment posters
+ Deliver medical supplies (small, but stacks up to 25 deliveries)
+ Killing occupying faction soldiers in the town ("Resistance Victory", stacks)
+ Large sales at a gun dealer in town ("Black Market Activity", stacks)
+ Low stability in the town ("Growing Discontent", accumulates roughly hourly while stability is under 30%)
++ Assassinating an occupying faction officer
++ Winning a battle for the town
++ A nearby base held by the resistance
+++ A nearby radio tower held by the resistance
+++ Running a pirate radio broadcast
++ "Revolutionary Momentum": a town within about 2km of a resistance-held town
Talking a civilian round in person also converts them one at a time. The chance is your Diplomacy skill, and each civilian can only be approached once.
Lowering support
- Occupying faction patrols reaching the town centre
-- A nearby base held by the occupying faction
--- Killing civilians
--- A nearby radio tower held by the occupying faction
--- Losing a battle for the town. Every supporter in the town abandons the resistance as well
Only one radio tower entry and one base entry can apply to a town at a time, and an occupying one wins: a single enemy tower within reach cancels out any number of friendly ones, and the same goes for bases. A sabotaged radio tower counts for neither side while it is off the air.
Each member of the population who supports the RF pays a small donation to the cause every 6 hrs (according to difficulty level). If stability is also high (over 75%) they will pay double, regardless of who occupies the town.
Villages flip on their own. A village with 75% support or more and at least 50% stability may pass to the resistance at any recalculation, and at 85% support it is a certainty. It works in reverse too: a resistance village whose support falls below 25% can drift back to the occupying faction, and below 15% it will.
Towns and cities never flip peacefully; they require a battle. The next time any resistance member enters that town/city it will trigger a battle as long as there is not one already and the Occupying Faction has the resources.
Once a town is yours you start collecting taxes.
Support shows up on the territory shading as well as in the town's info panel. While the occupying faction still holds a town, the ground around it is drawn with diagonal hatching once half or more of the population backs the resistance, so a town on the turn is visible without clicking it.
The three modifiers that come from somewhere else on the map, the nearby radio tower, the nearby base and revolutionary momentum, can also be drawn as lines. Select a town, a radio tower or a base and the influence overlay connects it to the places on the other end of those relationships, and shows which of them are actually in effect.