old post apocalyptic anime

right ik this is probably impossible to answer however 10/12 years ago i saw this post apocalyptic anime movie and all i can remember about it is that was that its art style was 80s/90s, it had a big full on war threatening a second fallout and that there was this massive white larva looking bug im sorry this isnt much help but id appreciate it if anyone helped me find out what it was

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