Alliances between countries started happening all over the world to protect themselves and others from inevitable wars.
The Big Stick Diplomacy is by President Theodore Roosevelt which was based on the theory that the United States could use force to maintain stability in Latin America. It was in the Roosevelt Corollary that the U.S. use "international police power" in Latin America.
Big Stick Diplomacy and Dollar Diplomacy
Chinese Exclusion Act and European Restriction Act
The Chinese Exclusion Act of 1882 was the first significant law restricting immigration into the United States.
During World War II (1939-1945), the Battle of Normandy, which lasted from June 1944 to August 1944, resulted in the Allied liberation of Western Europe from Nazi Germany’s control. Codenamed Operation Overlord, the battle began on June 6, 1944, also known as D-Day.
The Southeast Asia Treaty Organization (SEATO) was an international organization for collective defense in Southeast Asia created by the Southeast Asia Collective Defense Treaty, or Manila Pact, signed in September 1954 in Manila, Philippines
The flamethrower, which brought terror to French and British soldiers when used by the German army in the early phases of the First World War in 1914 and 1915 (and which was quickly adopted by both) was by no means a particularly innovative weapon.