Likely stands for "Tank Battalion Mod" or a similar armored warfare project.
While you cannot open a .001 file in isolation, once paired with its siblings (usually .002 , .003 , etc.), the combined archive typically contains: tbm-hun-leo-1.7z.001
Data tweaks to ensure the tank behaves realistically within the game engine. Technical Checklist: How to Use It Likely stands for "Tank Battalion Mod" or a
Ensure you have downloaded every part of the sequence. If even one part is missing, the archive will fail to extract. the archive will fail to extract.