I am getting a startup crash when attempting to play with Bob's Warfare and Endgame Combat. I have tried running with only these 2 mods (and their libraries) and the crash occurs.

I've raised an issue with Reika of Endgame Combat and he believes its something in your capsule definitions that is breaking his parser. I've looked at his parser and your capsule defs and I don't see anything in particular that is different from vanilla or other mods' capsules, though I'm not a Factorio modder, just a fellow programmer having a look under the hood.

Any help that you can provide on your end would be greatly appreciated.
Thank you

p.s. Link to Endgame Combat Github issue: https://github.com/ReikaKalseki/Reika_FactorioMods_Issues/issues/285

I've gone through my mod, looked at both of the capsules and compared them to the game's base mod.
I've made note of the differences (Which are perfectly valid to the game) and noted them on the linked page on github.