Why was world war 1 more destructive than earlier wars?

What made World War I more devastating than any previous wars because it involved countries all over the world, there was new advancements technology,  for example chemical gases, tanks, planes and it was unrestricted warfare,countries could attack civilians of another country.

the dominoes began to fall. the surrender at appomattox took place a week later on april 9. while it was the most significant surrender to take place during the civil war, gen. robert e. lee, the confederacy's most respected commander, surrendered only his army of northern virginia to union gen. ulysses s. grant

explanation:

c, because the american revolution was from 1765 to 1783.