Fourth generation warfare accepts that there is a change in the nature of war, with war now being something that comes to us, rather than we to it, thanks to the magic of immigration, which makes all things possible:

“Many First World countries, in an act of folly almost without precedent, have imported Fourth Generation war by the literal shipload as they admitted millions of immigrants and refugees from other cultures. Some of those immigrants and refugees will refuse to acculturate, often on religious grounds. Others might be willing to do so, but are arriving in numbers so great they overwhelm the acculturation process. These immigrants offer a base for Fourth Generation war on the soil of any country that receives them.”
- 4th Generation Warfare Handbook by William S. Lind and Lt. Col. Gregory A. Thiele, USMC (2015)
https://www.amazon.com/Generation-Warfare-Handbook-William-Lind/dp/9527065755/ref=sr_1_1?s=books&ie=UTF8&qid=1530503429&sr=1-1&keywords=4th+generation+warfare+handbook

     Civil wars are likely throughout the West, or are now occurring; with some authorities, such as Gustav Kasselstrand, the leader of the newly founded Alternative for Sweden party(Alternativ för Sverige), saying that places in an advanced state of multicult decay, such as Sweden, are already in low intensive civil war:
https://voiceofeurope.com/2018/06/swedish-political-leader-what-you-read-about-sweden-in-alternative-media-is-true-we-are-in-a-low-intensive-civil-war/
https://gellerreport.com/2018/06/sweden-civil-war.html/

“It is very bad. What you read about Sweden on alternative news platforms is true. We are facing problems more severe than ever before in our history, where Swedes face a situation of being a minority within 20 years if nothing is done to stop the replacement of our people. I would describe the problems in Sweden as some kind of low-intensive civil war (with gradually increasing intensity for each day). What makes the situation even more difficult is of course the extreme political correctness that has haunted Sweden for decades, but which is now finally breaking up. The situation has gone so far that the politically correct people lose ground and we are entering a state of retribution against politicians and media who bear the responsibility for turning my previously peaceful and prosperous country into a real mess, which is now used as a warning example for other Nordic and European countries, yes, even for countries all over the world. The political establishment is both unwilling and unable to do anything about the problems. It’s all talk and no action. They are the cause of the problems and simply need to be replaced for Sweden to be able to recover.”

     However, none of the power elite will go quietly into the night, and with the possible breakup of NATO to add to the equation, all sorts of weird military adventures are being undertaken across the West, such as preparing for literally fighting underground, below the surface of the Earth:
  https://www.thetimes.co.uk/article/prepare-for-break-up-of-nato-eu-leaders-are-told-90z9r72qx 
  https://www.military.com/daily-news/2018/06/24/army-spending-half-billion-train-troops-fight-underground.html

     No doubt, this is all intended for the local population, should they pop. This is the illogical conclusion of the cult of Western guilt and the suicidal philosophy of liberalism:
  https://www.gatestoneinstitute.org/12569/guilt-museums-artifacts