The United States Navy began it's participation in WWI on April 6, 1917. This happened inmediatly after the declaration of war on the German Empire, after more than two years and a half of president Woodrow Wilson trying to keep the US out of the war.
The main focus of the US Navy was to convoy supplies and men to France and Italy, and to counter-attack enemy U-Boats in the Atlantic and Mediterranean seas. U-Boat stands for 'Unterseeboot' which literally means 'Undersea Boat'.
Very few decisive submarine maneuvers took place because of the US late entry to WWI, and the main ships from the navy never really engaged the German Empire fleet.
Inflation raises prices, lowering your purchasing power. It also lowers the values of pensions, savings, and Treasury notes. Assets such as real estate and collectibles usually keep up with inflation. Variable interest rates on loans increase during inflation.
The communist regime of USSR led by Gorbachev was no longer willing to intervene in the eastern countries, in a time that the countries were facing increasing pressure for freedom and liberties. The success of some early uprising in countries like Hungary endeared other countries to follow suit.
The United States was unprepared for the attack at Pearl Harbor because up until that point America was not involved in the war. It was at that point that we became involved in the war.
