The United States of America is the second largest country in North America and third largest on Earth and comprised of fifty states and a federal district.
The United States was one of the main proponents in World War II, allied with the United Kingdom, the Soviet Union and France. The U.S. became entangled in the war after the attacks on Pearl Harbor (in Hawaii) by Japan's Imperial Navy, and the two countries became two of the strongest nations in the fight. The U.S. ended WWII by dropping nuclear bombs on the Japanese military cities of Hiroshima and Nagasaki, which resulted in mass destruction and many deaths.
Several years later in 1954, America was carrying out a Nuclear Test codenamed Castle Bravo. Fallout from this test at the Bikini Atoll drifted over a Japanese fishing boat called the Daigo Fukuryu Maru (Lucky Dragon No. 5), and led to its occupants suffering from radiation sickness shortly after returning to Japan. It was these two bombs, plus the later test and the resulting horror and destruction that led to the idea for Godzilla.
The United States has been attacked several times by kaiju in many films of the Godzilla franchise.
A mutated iguana named Godzilla stormed across America and engaged the military in NYC during the events of the film. Later, his surviving offspring assists H.E.A.T., and journeys across the U.S. and parts of the world to handle kaiju-related threats.
In the film, Rodan attacks New York City.
The United States was one of the nations involved in World War II and was an Allied power fighting against the rivaling Axis powers. In 1944, an American pilot named Hank Marlow battled with Japanese pilot Gunpei Ikari after they crash-landed on Skull Island after a dogfight. They sparred until Gunpei got the upper hand and nearly killed Marlow until they were interrupted by Kong's arrival. Sometime later, Gunpei and Marlow put their country's differences aside and became friends, though Gunpei was later killed by a Skull Crawler, much to Marlow's dismay.
In 1946, Monarch was formed by President Harry Truman to study the existence of Massive Unidentified Terrestrial Organisms and if necessary kill them to prevent mass panic and keep them a secret from the public. In 1954, the United States Navy collaborated with Monarch to study Godzilla and lure him to Bikini Atoll to kill with a hydrogen bomb under the guise of bomb testing.
During the Vietnam War in 1973, many were protesting in the streets of Washington, D.C. to end U.S involvement in the war. At this time, a helicopter squadron called the Sky Devils were stationed at Da Nang Air Base in Vietnam during the war.
In 2014, the United States suffered a series of devastating attacks and skirmishes by two MUTO's and Godzilla. The first attack occurred in Honolulu, in which the male MUTO attacked Honolulu International Airport before he had a brief confrontation with Godzilla. A large part of Honolulu was destroyed when Godzilla's arrival inadvertaly caused a tsunami. Las Vegas was decimated by female MUTO who rampaged through the city after being awakened from her containment site. The final assault occurred in San Francisco, in which the U.S military attempted to to take out the monsters, suffering several casualties as a result. However, the two MUTO's were slain by Godzilla who left the next morning and departed to the ocean again.
The attacks were responsible for revealing the existence of the Titans to the public. Monarch's existence also became public knowledge as well. The attacks resulted in massive property damage and a large loss of human life, as memorials were installed to honor those lost in the attacks. The U.S government and then public alike had a bad opinion of the Titans, believing that they should be exterminated to prevent another horrific attack from occurring.
In 2019, King Ghidorah was awakened by rogue Monarch operative Emma Russell and a group of eco-terrorists led by former British Army colonel Alan Jonah. After Godzilla was seemingly killed by the Oxygen Destroyer and Ghidorah proclaimed himself the King of the Monsters, several Titans awakened from their containment sites around the United States. Among them being Scylla and Queen MUTO, the former of which attacked Phoenix. During Ghidorah's reign of terror, Washington, D.C. was destroyed and the U.S military suffered heavy casualties fighting against Rodan. After a final battle that leveled Boston, Ghidorah was slain by Godzilla, allowing the latter to render the Titans docile.