Looking for credible defense communities

Hey, I'm looking for communities about the following topics. If they don't exist, I'm interested in creating them here. These may or may not be in the same community, I'm just listing the things I'm looking for, happy if there's any cross-polination.

• Ukraine war discussion. I do see one Ukraine@lemmy.ml, but it's unclear if that's their general Ukrainian discussion (like eg we have here for Canadian discussion), or about the broader war. Seems like the best one so far.
• Ukrainian footage and map updates
• Non-Ukrainian discussion on broader defense topics, like procurement, military industrial investments, new platforms or inventions.
• Combat footage.
• Something like the /r/CredibleDefense subreddit

If anyone knows any communities like this, or is interesting in starting some with me (name ideas? maybe WarReport?), please let me know. Thank you!