|Los Angeles Campaign|
|Part of World War II and Second American Civil War|
Left: Japanese-American recruitees and their families arrive at Santa Anita racetrack for assignment into temporary shelters and units. Right: Imperial Japanese soldiers resting in Pasadena after a firefight.
Republic of California
Empire of Japan
United Mexican States
| United States of America (1943-45)
Union of American States (1945-47)
|Commanders and leaders|
| Isoroku Yamamoto|
Chester William Nimitz
| Holland Smith
2300 artillery pieces
2 aircraft carriers
7000 artillery pieces
2 aircraft carriers
|Casualties and losses|
137 tanks destroyed
500+ artillery pieces destroyed
330 aircraft destroyed
1 battleship sunk
4 destroyers sunk
4340 artillery pieces destroyed
500+ aircraft destroyed
376 tanks destroyed
5 destroyers sunk
4 battleships sunk
1 aircraft carrier sunk
The Los Angeles Campaign, codenamed Operation: Peacock by the American Army and Operation: Tenshi by the Japanese and Californian Armies, was an military campaign fought from Valentines' Day 1943 until the unconditional defeat and surrender of the Union of American States in 9 September 1945 in the Greater Los Angeles Area. It was one of the largest offensives ever undertaken by the American Army against the Secessionist Alliance and their allies.
On Valentines' Day 1943, the California National Guard and the elements of the United States Army began an invasion to retake the Greater Los Angeles Area in what is know known as the Valentines' Day Offensive. The well-prepared United States Army overwhelmed the battle-weary Japanese and Californian positions in Irvine and Temecula. They continued to push until they reached West Los Angeles. The United States Army pushed through Chino and Ontario until they were met with a fierce Japanese and Californian entrenchment in Pasadena.
The Japanese and Californian forces, surprised by this sudden invasion, launched numerous defensives and offensives against the United States. With the reorganization of the United States onto the Union of American States, the US forces made a temporary ceasefire from Thanksgiving 1945 to January 5th the following year. This ceasefire allowed the Japanese and Californians to rest and more Japanese troops arrive alongside Mexican troops from the South. The combined Japanese, Californian, and Mexican forces was able to push the UAS forces out the San Bernandino County and San Fernando Valley. They continued to the force the UAS forces out of numerous cities until the UAS announced unconditional surrender.
The Los Angeles Campaign was an important battle in both the Second American Civil War and Second World War. It marked the strength of the people of California and the amount of support it had. This campaign also marked the beginning of the Weaponized Sodium Era.
1942, California declared independence from the United States and established itself as the Republic of California. In response the California National Guard and the US Army attempted to stop the revolting soldiers, but it didn't work out. Soon, an ultimatum was issued by the Republic of California to the United States to cease hostilities. The US responded by sending more soldiers. With US early victories, the US Army and Marines made their way into the Greater Los Angeles Area. The Japanese army had pledged support to the Californian Army and followed through. Soon, half of the California National Guard turned on the US and began fighting for Californian independence. In 1943, the US Army decided to launch an offensive against the Californian and Japanese forces in the Greater Los Angeles Area.