According to Star Charts, Bajor and Cardassia are only about five light-years apart, with Bajor closer to Sol than Cardassia.
Or rather, their projections onto the 2-dimensional plane of the map are about 5 ly apart. There's no telling from the map alone how far apart they may be in the "vertical" plane. It's always important to keep that in mind when looking at
Star Charts maps. (This was one advantage of the 1980
Star Trek Maps. It showed both the "top" and "side" views of the Federation so you could see it in three dimensions.)
I think the DS9TM also said the same.
Okay, that's a more reliable source of information. It says they're 5.25 ly apart. So that would mean they're both at the same "height" relative to the plane of the
Star Charts map.
Additionally, looking at the sphere of destruction outward from the Azure Nebula, by the time the Borg were recalled to the Nebula they would have barely brushed "southeastern" Cardassian territory...
Galactic north and south are perpendicular to the plane of the map. The Y axis on the Alpha/Beta Quadrant maps is coreward-rimward. And to the right is antispinward, which by planetary analogy would actually be western, not eastern. So you mean rimward-antispinward Cardassian territory. "Southeastern" would be on the left side of the map and below the plane of the page.
; unless a Borg force proceeded directly for Cardassian space without stopping to engage in battle between their emergence in the Azure Nebula and their retreat back to the AN, I don't see where they would have significantly invaded Cardassian territory at all.
Agreed. There's no evidence that Cardassian space was hit by the Borg, and every reason to believe it wasn't.
Regarding Cardassian ship losses in the Nebula, we don't know how many they actually sent.
According to
Mere Mortals, they sent one battle group. That probably means around 7-10 ships of various sizes, going by what Wikipedia says about naval battle groups today.
Additionally, it seems likely that the majority of Starfleet losses were not in the nebula itself, but in Federation/Klingon/Romulan space while defending planets and installations...and without similar losses defending Cardassian territory, could it be that the Cardassian fleet now outnumbers Starfleet, post-Destiny?
Immensely unlikely, considering that the Cardassian fleet was devastated in the Dominion War along with Cardassia's infrastructure. They've spent the intervening five years just struggling to feed their people and rebuild their cities -- they could hardly afford a massive military buildup, and the new, post-Central-Command regime is too smart to have such skewed priorities. And their whole empire is tiny compared to the Federation, so even at their peak, they wouldn't have had more than a fraction of the number of ships the Federation had.