Effects of World War I

What were the effects, during World War I 1914-1918, of trench warfare on the Western Front?
World War I had claimed many lives and was a great tragedy; the reason the war had started was because most of the other European countries had great empires consisting of many other countries. However Belgium did not have anything to do with these great empires instead she opted out of any wars and any political fights, so she became a neutral country. Even though she had refused to fight, Belgium helped the wounded and anyone who sought medical aid. Whilst the rest of the European countries were…