Sorry about the slight delay in posting this cipher. There’s plenty of background contextual information, all of which will be revealed once you’ve solved it:
TYFXTGXQYGTUYIIUHIFQDIXTDBQVITGEO
QVTYRLOEITLYQOINBULWJLYLQOBXQPUIT
GDEPDITIEITLYGTBXUVWTVDISUDGVTPUS