(My turn - apologies to the mods for orginally posting this in the wrong place)
I wonder if you can help me? I've been trying to find an old anime film I watched 5/6 years back, on the Sci-Fi channel's Saturday midnight anime slot. The film itself was a mecha film, but with the mechas apparently being the leftovers of a much older, more advanced civillization. The current empires have technology, but more of the piston-prop planes, etc, variety, and want the mechas as weapons in their war.
It opens with a boat dredging up a small mecha from the sea, shortly before they are attacked by a plane which shoots up the boat up and takes it. Much of the story consists of one empire having found and dug up a huge mecha, which the other empire cannot stand against (despite blowing it's legs off with salvaged high-tech explosives, during a suicide attack by a lot of smaller mechas who clung to it's legs and blew themselves up as well).
In desperation, the leader of the second empire uses their own giant mecha (a legless, floating one with an energy shield), which has a direct mental control system that also sends people insane.
He destroys his opponents, and then begins destroying his own cities, ranting about how the blood will water all the pretty flowers, flowers everywhere. A soldier in the mecha with him breaks his neck, but the mecha itself repairs his body, and he continues the rampage.
There where also people with a sort of special power, who swung pendulums in small circles, and somehow powered a lot of the mechas (six or so were needed to power the first giant mech.)
I know it's not much to go on, but any ideas? Many thanks.