The Northwestern Gang Wars was the term given to the post-World War IV gang wars in the Pacific Northwest of the United States. Several major cities, including Sitka , Mikhailgrad , Ross , Petropavlovsk , Beringia , and Los Angeles
were affected by it. The last of these cities to be "cured" of the gang wars was Ross. The gang wars started in the 1920s and worsened in the 1930s with the onset of the Great Depression. The largest of the groups was the so-called Mexiquean Mafia, which derived from the Neapolitan-based underground gang. Death numbers and assault frequencies dropped as several immigrant-based vigilante groups formed with the Alyeskan Exodus in progression. Several of these vigilante groups became open crime-fighting groups in the 1950s and 60s, the most well known of which is the Asian American Crime Fighting Syndicate, which operates even today in several locations with many branches. The gang wars officially came to an end in the 1980s with the truce signed between the AACFS and several Los Angeles gangs.