oh! ok! :)
sorry for the late response i feel asleep
first i try and learn about the war that im abt to draw and the countries involved
so i look up the uniforms and the area the war was fought, and i try my best to draw the uniforms
basically the same with guns

the explosions kinda differ between what bomb it is
small, big, atomic
they all have different looks when they explode

normal bombs are just bigger than a tank for prespective while atomic bomb explosions are as big as citys
i dont really know how to explain how i draw them, so sorry abt that :(