I didn't see in the rules what the limit is for a turn + battle? Please advise.

In the first post of this topic – at the bottom – there is a link to Rules.
You need to look at section III. Map settings options.
For см-ки:

the time limit per turn is 6 minutes.

For others – we look at the specific template.

All newcomers should carefully study Section II. Rules for online games, common to all templates (SoD version).

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