Reddit mentions of Resistance to Tyranny: A Primer

Just some basic things can making them getting to you too difficult to continue. Basically make them go a different way.

• Block avenues of approach
  
  • Drop trees on roads
    
    • enough trees will even stop tanks
      
  • Makes them have to spend resources on clearing the way.
    
  • Harass them while clearing it. i.e. sniping
    
• Harass them
  
  • make them spend manpower protecting their stuff
    
  • sabotage their things
    
    Some books to learn from (I haven't finished them all yet). Some of these are just to understand modern warfare or conventional warfare which is important to understanding how to get around it.
    
    
• How to Make War
  
• U.S. Army Guerrilla Warfare Handbook
  
• U.S. Army Guide to Boobytraps
  
• U.S. Army Improvised Munitions Handbook
  
• U.S. Army Special Forces Guide to Unconventional Warfare: Devices and Techniques for Incendiaries
  
• Resistance to Tyranny: A Primer
  
• Carnivore: A Memoir of a Cavalry Scout at War (unsure how much this one will apply)
  
• Ministry of Ungentlemanly Warfare: How Churchill's Secret Warriors Set Europe Ablaze and Gave Birth to Modern Black Ops