1)
Even
though America was not directly involved in the war against Germany, it
condemned Germany aggression and issued several warnings to Germany.
2)
But
Germany refused to pay heed to American warnings and continued using submarines
indiscriminately.
3)
German
submarines targeted a boat named Lusitania and wrecked (broken) it.
4)
Several
American passengers on board were killed.
5)
Therefore,
at last America waged a war against Germany on 6th April 1917.
