Placeable objects in the scene are used as a demo only and are downloaded for free mostly from turbosquid. 
You should not use these objects in your final projects unless checking you have the right to from the links. 

The satellite dish is from https://www.turbosquid.com/Search/Artists/TSB3DModels

The container is from 
https://www.turbosquid.com/Search/Artists/nahdlc

The pedastal is from 
https://www.turbosquid.com/Search/Artists/Bill-Nguyen

The generator is from
https://www.turbosquid.com/Search/Artists/GameGeared

The light is from 
https://www.turbosquid.com/Search/Artists/mbaharoon

The main building is from 
https://www.turbosquid.com/Search/Artists/Constantinep

The turret is from 
https://www.turbosquid.com/Search/Artists/Ursanim

The Log is from
https://www.turbosquid.com/Search/Artists/Mr_Pibody

All other objects are created by myself for demonstration. 
Feel free to use these assets however you wish.