All the rights of source and assets of this project belong to Epic Games. This is just an uploaded copy of a backup I had, as this project disappeared from the official epic games store.
Note that there may be minor changes done by myself (may have saved something without noticing back in the day), but as I remember I haven't changed anything important, so the project is nearly the same that I did download.
Official documentation can still be found in unreal's docs:
https://docs.unrealengine.com/en-US/Resources/SampleGames/StrategyGame/index.html