A great loss

The war that had the highest amount of deaths and wounded men was world war 1.  This most likely happened because the weapons were not as developed and the soldiers fighting in the war would run in to the battle with out thinking.  The tactic of the war at this time was to wipe out as many men at once, in doing this it cause a greater number or casualties.  By having so many deaths in one war this probably caused a population decrease.