мировая война

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# Upgrade this version will delete the old save progress!
v2.1：
> New armaments system
> New Arms technology Trading
> New 7 country's classic rifle series
> New regions: 4, Cities: 10
> Adjusted the city interface
> Increased the power of tanks and navies.
> Fixed an invalid attack BUG
> Other optimization and adjustment

* Thank you for support and evaluation
* Will continue to make efforts doing better