Somehow created a character on EU?
Yes deleting and choosing a U.S. server will work. But if you have anything you want to keep that not soul bound, put it in your bank first.
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Also salvage anything you can’t store to chuck in the mats section.
If you already had characters and somehow had your account transferred overseas I’d submit a support ticket.
You might have to wait a week first before you can transfer. Choosing a server for the first time is considered by the system to be a transfer and there is a week between any transfer.
Transfering
“Accounts without active characters
The transfer fee is waived for accounts without any active characters. This allows players just starting out to change to another world that is not full. You also can transfer without cost if you delete all your existing characters. The next time you log on without any characters, you will be prompted to choose a new home world. Please be aware of the following:
1) Transfers to any game world — whether free or paid for with gems — are allowed only if the population of the world is at less than capacity.
2) Transfers to any game world — whether free or paid for with gems — are allowed only once per seven days.
3) If you decide to delete the characters on your account, Customer Support cannot restore them, in whole or in part.
4) Items left on the characters will be deleted and cannot be restored. Move items to your personal account bank to preserve them."
ANet may give it to you.