Hey the answer is trench warfare. presuming you're talking about when they fought in trenches across no mans land. hope this helps, have an amazing day :)
        
             
        
        
        
The Maya civilization was one of the most leading native societies of Mesoamerica. Not like other dispersed indigenous inhabitants of Mesoamerica, the Maya were positioned in one geographical block casing all of the Yucatan Peninsula and modern-day Guatemala; Belize and portions of the Mexican states; and the western portion of El Salvador and Honduras. This deliberation presented that the Maya continued moderately protected from attack by other Mesoamerican peoples.
        
             
        
        
        
The imperialism had a massive effect on Europe, especially its western part. The countries that were imperial powers managed to get hold onto territories all over the world. By managing to control these territories, the imperialists had lot of natural resources and very cheap labor force at disposal. This enabled the industry in Europe to have constant growth, and the manufacturing to skyrocket, thus there were more and more products for the market, and more and more wealth was coming because of it, resulting in strong and well developed countries in Western Europe.
 
        
             
        
        
        
Answer:
la Bizona Francia, Gran Bretaña y Estados Unidos