I Think It Began In Great Britain. I'm Not 100% Sure Though.
It was on of their most thought out plans of warfare using the u-boats
Answer:Because they didn't want journalists to spread false news and get the people mad
Explanation:yes i agree with them because do you want people spreading false news about you its is better for nothing to be spread than false things spread
President Polk wanted California but knew Mexico would not agree to sell it and his only avenue was to start a war (knowing the US would win it).