When Federation is going though very dark times. The talk major fleet battles means great deal death or worst assimlation depend on who bad guys. Say villian very scary what more scary then Borg.
On other hand might Federation it self going from real strick security messer and Federation going dark time own doing include proempt strike against Romulan and Klingon star Empires. Someways acting like did after sept 11 or build more militery fleet more militrized after conflict Rolulans existed. Taking type security messer off charts what needed.