Volley and Indirect Fire promotion bug

[breezytrees]

First off, I REALLY enjoy GEM. Breathed new life into a title I had gotten bored of. Offers a challenge even on king. I'm beyond impressed.

Regardless, point of post: I can't seem to unlock either Volley or Indirect Fire. I thought perhaps I had to unlock both barrage and accuracy, but it doesn't do anything as you can see:

The promotion tree of the various unit seem a bit inconsistent in general, so I'm not sure if this is a bug or not. It is unclear which promotions unlock other promotions, as the "unlock lines" in the promotion tree don't seem to follow the same ruleset as the "unlock lines" in the technology tree.

Only mod I'm using is GEM. Save file is attached.

edit: wow that's a big screenie. Apologies.

 

[Thalassicus]

Welcome to the forums breezytrees!

Thanks for pointing out the issue with volley and indirect fire. I fixed it for Gem v1.12.1.

Promotions use "OR" prerequisites, while technologies use "AND" prerequisites. I agree it's a little confusing. I have some ideas for a better design for promotion trees, but it would take a lot of work, so I've focused on other priorities. Basically my thought is side-promos like March could require a level 3 unit instead of level 2 promotions. It would be much simpler, and let us do interesting things with high level promotions.

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