Okay, the Ogres have the be allied with the goblins. It's the only explanation for their bizarre behavior. When they showed up on the map, I was glad for once. They would inevitably end up in a fight with the Goblins. Instead, they went in the opposite direction of the goblins. They went toward my megaproject and entered the mausoleum located beneath it. I feared that they were going to smash everything inside, but instead they're just hanging out inside. They've made it their own little Ogre hamlet. So now once I deal with the Goblins I'll have Ogres to fight. Though by this point that's par for the course.
Also after examining some of the feature of Dwarf Therapist I learned that only 3 of the original founders are still alive. In fact, almost all of the Dwarves from the forts early years have died. Now only the idiots that thought it was a good idea to visit our little slice of hell remain.
EDIT: The goblins finally left. However, not before one final insult to my Fortress. One of the swordsman didn't go with them. He stayed, and made his way into the Fortress since I didn't notice his presence. He took only one victim; my very last soldier. Since she was basically a cripple, she didn't put up a fight and was cut down almost instantly. Then, like a coward, the Goblin fled into the depths of my Fortress and proceeded to exit the map through the caverns. The only upside to this is that it revealed a flaw in my cavern defenses.