Well, many people who are new to BDO create a guild of 1 player to explore what it is, and suddenly they are in war with a guild while they even don't know what is guild war is XD
You can't declare war on a guild like that. To declare war on a guild the guild needs to be ready for war. That means (if the rules didn't change) that the guild declared war themselves or that they own a Node.
Don't be in a guild as a brand new player if you don't want this feature, or an even better solution is have your guild put you on protection.
You can't declare war on a guild like that. To declare war on a guild the guild needs to be ready for war. That means (if the rules didn't change) that the guild declared war themselves or that they own a Node.
You can, they've changed the rules quite a while ago, I believe it was a 2021 patch:
From the Wiki:
"
Declaration of war
You can declare war towards other guilds here. Only available to the guild master and ranks including officer and above.
You can declare war to a maximum of 6 other guilds, and each declaration costs 150,000 silver taken from the guild funds.
Guilds with active guild wars or in possession of a node or territory cannot declare war on guilds not on the same conditions as them.
A guild not in war with another guild and not in control of a node or territory can declare war on any other guild.
"
In particular the last line, as long as a guild does not own territory/node/is in war, it can declare war unilaterally.