On Stardate 44002.3,the Federation was handed its worst defeat since the Battle of the Binary Stars that set off the first Klingon War — and despite a hellacious and damn-the-photon-torpedoes fight, the Borg easily wiped out 39 starships, or leaving nothing between them and soil.
Well,apart from for the Enterprise, and Data, or really bad security software coding in the Borg back systems.
Source: blastr.com