Patch v0.25.5 rewrites the alliance damage bonus. From 1 September, 00:00 UTC:
- Full bonus: +20% (up from +10%)
- Held up to a world development share of 10% (down from 15%)
- Above that, every share point costs 4 points (was 0.5)
- Floor: -20% (was 0%)
Read that last line again. An oversized alliance is no longer merely unrewarded. It fights at a damage malus.
WHAT THAT MEANS FOR THE MAP TODAY
We priced every alliance under the new curve, with live development data:

The Inglourious Basterds sit at 23.5% of world core development and land on the -20% floor. B.E.E.R (21.1%) and The Olive Union (20.0%) join them there. All three fight at +6 to +8 today. ATLAS is 0.4 points over the line and starts September at +18%.
Everyone below 10% simply doubles, from +10% to +20%.
THE WINDOW IS OPEN UNTIL SEPTEMBER 3RD
The devs lifted the 7-day alliance cooldown until 3 September, 00:00 UTC. Leaving, being kicked or disbanding does not block joining or founding another alliance until then. This is the moment to redraw the map, and the maths is not obvious: splitting a 21% bloc in half still leaves both halves over the line.
So we built a calculator. Pick your alliance, click countries to move them between "stays", "new alliance" and "out", and watch both bonuses update live:

The Olive Union, for example, splits cleanly: two halves at 10.0% each, both at the full +20%. B.E.E.R in halves lands at +18 and needs three pieces for the full bonus.
Try it with your own alliance: https://warera.unikhorne.dev/tiers , tab ALLIANCES. The numbers refresh with the world, so what you see is always current.
One footnote: the patch note says "world development share" without giving a formula. We count the alliance's summed core development divided by world development. Thanks to excelsior97 for the correction (core, not current); the desk was updated the same evening.
TWO MORE THINGS FROM THE PATCH WORTH YOUR TIME
- Fighting for your own country now pays +20%, double the old bonus, live since the patch. Home battles just became the most efficient place for your food and ammo.
- Deposits now roll their own +20 to +40% at discovery. A rich one is worth relocating for. The market terminal at https://warera.unikhorne.dev/market shows every active deposit with its real figure, and the Discord bot announces rich finds.
All of it free, no login: https://warera.unikhorne.dev