The flags are designed from a list of presets, an emblem, a flair, a base, and a background. I did the best I could, it's a cog on a shield. Surprisingly, the most difficult part was picking a clan tag, as all those were taken...
Anyways, Twelfth Bay [12B] is up!
There's a few things an alliance does, off the bat.
First is participation in wars. Attacking another alliance and stealing their flag scores you war points. The top three alliances at the end will receive 10,000, 5,000, and 2,500 fuel, split evenly between the top 10 players of those alliances.
Second is finishing War Tasks, which are done by donating resources (food, water, metal, wood, cloth, ammo) and earning task points, and spending those task points on buffs. Buffs include "repairs to structures cost less", "collect more of everything from drop-offs", "find more, and better, items while looting", and "use less ammo and do more damage against infected" and if you activate all 4 buffs, it unlocks the super buff, which does things that include reduced return times, higher chance for good crafting, and more fuel loots. Required resource donations are in the range of 3-6 thousand each. Buffs reset at the end of every war.
Third is an alliance chat channel.