The Borg were already on their way to Earth thanks to a bit of a bootsrap paradox (ST:FC they go back in time to the late 21st century & crash in the Arctic > they’re thawed by United Earth Starfleet > they send a transmission to their hive in the Delta Quadrant taking over a century > the Borg send a Cube > that’s the cube Picard encountered in J-25).
And the prevailing theory was Q flung the Ent-D there out of benevolence. Get the Federation to start preparing for both the Borg, and by extension the Dominion War. The entire fleet revamp was kicked off because of the disaster at Wolf-359, and most of the new class of ships were commissioned and deployed by the start of the Dominion War
The Borg were already on their way to Earth thanks to a bit of a bootsrap paradox (ST:FC they go back in time to the late 21st century & crash in the Arctic > they’re thawed by United Earth Starfleet > they send a transmission to their hive in the Delta Quadrant taking over a century > the Borg send a Cube > that’s the cube Picard encountered in J-25).
And the prevailing theory was Q flung the Ent-D there out of benevolence. Get the Federation to start preparing for both the Borg, and by extension the Dominion War. The entire fleet revamp was kicked off because of the disaster at Wolf-359, and most of the new class of ships were commissioned and deployed by the start of the Dominion War