Alternate timeline
(covers information from an alternate timeline)
Delta-7 was a Confederation Corps company that fought in the Vulcan War.
In 2401, Delta-7 was captured by the Vulcan Defense Forces and was being held captive in the northern foothills of Mount Tar'Hana. This company had the trigger for the Metreon Cascade, which was considered essential by the Corps for defeating the Vulcans.
This company was mentioned in a paragraph describing the situation for Order 939. (PIC: "Penance")