How to Edit Maps
MC:V is built on the Source engine, specifically the CS:GO branch. Level editing is down with the "Hammer" editor or the included Hammer++ [\Military Conflict - Vietnam\bin\win64\hammerplusplus.exe]
The Valve Developer Community Wiki is incredibly useful for learning all about the Source Engine and the editor.
Tutorials
You can either start from scratch or start by editing existing maps.
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