Yes, Kaiserreich is compatible only with Armageddon 1.2-1.3b!
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### How do I install Kaiserreich - Two Options!
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A. Download JSGME and put it in your Armageddon folder. Then create a folder called MODS in your Armageddon folder and extract the Kaiserreich mod folder in the MODS-folder. Then open JSGME and the Kaiserreich mod should be visible in the white box on the left. Activate it using the arrow-button in the middle. Activation might take some time.
B. Extract your files into the Doomsday directory and voila you can play it! Please notice that by doing so you will overwrite all the vanilla files, so you have to reinstall it again. A better way is to firstly install Doomsday in a new directory say C:\Program Files\Kaiserreich and then extract Kaiserreich into it!
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### A. Steps on Installation of Kaiserreich - Direct Extraction Option
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1. Make a clean install of Hearts of Iron ARMA Version 1.2 or 1.3