To be able to start a faction war, you will now also need to have provisions ready. With each game tick, 1% is added to your faction’s provisions. When your provisions are at 100%, you can start a faction war. In order to max out your provisions immediately, you can pay some glowstones. The amount of glowstones depend on the remaining % of the provisions.
With this change, launching multiple wars in a short time will drain out your glowstones! Launch wisely!