In the early 90s I watched an animated movie about black hollow soldiers fighting on earth. They were made of decaying tissue from people thrown into some big vat or a cave. people/prisoners were transported inside big eggs. A couple, man and a woman, escaped by tossing a seed which grew into thorn like plant and cracked the shell.
There was also transporting "bird" basically two wings(flying wing organic plane like device) made of human tissue that was used as transport. The thing died at the end of the flight. I think it carried them to a group that spoke in past and future at the same time but never in present. Ultimately they have agreed on a war speaking in present time.
They somehow broke into the black soldier factory where these were being assembled and removed a vital piece from inside of helmets. It was a red ball/egg tissue organic computer.
The soldiers look like hollow medieval armor but with a futuristic design.