Also, warfleets were always hundreds of ships strong, even back when the shows couldn't afford to show that many. Case in point, "Redemption": the action involves dozens of ships, but only four are actually shown, yet the dialogue has the Romulans wondering why the dozens are coming because that's way too few to wage war with.
Which is good and necessary continuity for explaining away TOS as well. We see a single starship being perfectly capable of terminating a planet. Wars in the TOS era thus must involve something that stops single starships from being that devastating. Either it's other starships (but those are virtually never available in TOS for any purpose), or then something else (and DS9 finally reveals it's those orbital fortresses aka planetary defenses), but the end result must be that only great numbers of starships can terminate planets or else war (and Earth) would no longer exist.
Timo Saloniemi
Which is good and necessary continuity for explaining away TOS as well. We see a single starship being perfectly capable of terminating a planet. Wars in the TOS era thus must involve something that stops single starships from being that devastating. Either it's other starships (but those are virtually never available in TOS for any purpose), or then something else (and DS9 finally reveals it's those orbital fortresses aka planetary defenses), but the end result must be that only great numbers of starships can terminate planets or else war (and Earth) would no longer exist.
Timo Saloniemi
) But there you have it; it had nothing to do with anything in-universe. And one imagines that if they do a flashback scene to the invasion of Cardassia that they'll include ships that should have obviously been there, like the Sovereign, as they did when they included an Ambassador Class at Wolf 359 in the opening scene of DS9, despite there not (I don't remember) being one in the Wolf 359 wreckage scene in BoBW.