This is the place to post general stuff concerning the game. Want to express your love for hoplites or find people to play the game with? Want to share your stories about matches you have played or discuss historical connections to the game? These and any other topics which are related to the game, but don't have their own forums belong in this forum.
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Forums for decision-making on issues where a consensus can't be reached or isn't sufficient. The committees are chosen from among the official team members, but to ensure an open and transparent decision process it's publically viewable.
Do you mean the “Elephant Roundup” as displayed on the Mauryan Civilizations/History page in game? Unfortunately the civilization overviews contain a lot of misinformation. There is a patch for that ( https://code.wildfiregames.com/D2720 ), but it needs to be reviewed before it can be included in the development version.
Information displayed in the Structure Tree is correct.
Organic units can't be captured. You can only lure an elephant by attacking it with a ranged unit, which makes the elephant to follow it to wherever you want. Then you can kill the elephant with other units, provided that you keep the luring unit in a safe distance.