Sunken battleships are the wrecks of large capital ships built from the 1880s to the mid 20th century that were either destroyed in battle, mined, deliberately destroyed in a weapons test, or scuttled.
 The battleship, as the might of a nation personified in a warship, played a vital role in the prestige, diplomacy, and military strategies of 20th century nations.
 The importance placed on battleships also meant massive arms races between the great powers of the 20th century such as the United Kingdom, the German Empire, Japan, the United States, France, Italy, Nazi Germany, Russia, and Spain.
The Los Angeles crime family is an Italian American criminal organization based in California, as part of the American Mafia (or Cosa Nostra).
 Since its inception in the early 20th century, it has spread throughout Southern California.
 Like most Mafia families in the United States, the L.A. crime family gained power bootlegging during the Prohibition Era.
 The L.A. family reached its peak in the 1940s and early 1950s under Jack Dragna, who was on The Commission, although the L.A. family was never bigger than the New York or Chicago families.
 Since his death the crime family has been on a gradual decline, with the Chicago Outfit representing them on The Commission.
Acolman de Nezahualcóyotl is a town and municipality located in the northern part of Mexico State, part of the Greater Mexico City area, just north of the city proper.
 According to myth, the first man was placed here after being taken out of Lake Texcoco.
 In the community of Tepexpan, the fossilized bones more than 12,000 years old of a man were found in the 20th century.
 The settlement was founded in the 8th century and was an important commerce center at the time of the Spanish conquest of the Aztec Empire.
 After the Conquest, Acolman became the site of an important Augustinian monastery in the 16th century which still contains important art and architecture from that time period.
The McKesson & Robbins, Inc. scandal of 1938 was one of the major financial scandals of the 20th century.
 The company McKesson & Robbins, Inc. (now McKesson Corporation) had been taken over in 1925 by Phillip Musica, who had previously used Adelphia Pharmaceutical Manufacturing Company as a front for bootlegging operations.
 Musica, a twice-convicted felon, used assumed names to conceal his true identity in taking control of the two companies: Frank D. Costa at Adelphia Pharmaceutical and F. Donald Coster at McKesson & Robbins.
 Although he was successful in expanding the company’s legitimate business operations, Musica recruited three of his brothers, also working under assumed names, one outside the company and two inside it, to generate bogus sales documentation and to pay commissions to a shell distribution company under their control.
 Eventually, McKesson & Robbins treasurer Julian Thompson discovered the distribution company was bogus.
 It was eventually determined that about $20 million of the $87 million in assets on the company’s balance sheet were phony.
Jack Ignatius Dragna (April 18, 1891 – February 23, 1956) was an American Mafia member and Black Hander who was active in both Italy and the United States in the 20th century.
 He was active in bootlegging in California during the Prohibition Era in the United States.
 In 1931, he succeeded Joseph Ardizzone as the boss of the Los Angeles crime family after Ardizzone's mysterious disappearance and death in 1931.
 Both James Ragen and Earl Warren dubbed Dragna the "Capone of Los Angeles".
 Dragna remained the boss of the Los Angeles crime family from 1931 until his death in 1956.
The history of the Irish language begins with the period from the arrival of speakers of Celtic languages in Ireland to Ireland's earliest known form of Irish, Archaic Irish, which is found in Ogham inscriptions dating from the 3rd or 4th century.
 After the conversion to Christianity in the 5th century, Old Irish begins to appear as glosses and other marginalia in Latin manuscripts, beginning in the 6th century.
 It evolved in the 10th century to Middle Irish.
 Early Modern Irish, otherwise known as Classical Irish, was a literary language that represented a transition between Middle and Modern Irish.
 It was used by writers in both Ireland and Scotland until the 17th century, in the course of which slowly but surely writers began writing in the vernacular dialects, Ulster Irish, Connacht Irish, Munster Irish and Scottish Gaelic.
 As the number of hereditary poets and scribes dwindled under British rule in the early 19th century, Irish became a mostly spoken tongue with little written literature appearing in the language until the Gaelic Revival of the late 19th century.
 The number of speakers was also declining in this period with monoglot and bilingual speakers of Irish increasing adopting only English: while Irish never died out, by the time of the Revival it was largely confined to the less Anglicised regions of the island, which were often also the more rural and remote areas.
 In the 20th and 21st centuries, Irish has continued to survive in Gaeltacht regions and among a minority in other regions.
 It has once again come to be considered an important part of the island's culture and heritage, with efforts being made to preserve and promote it.
The West Main Street Residential Historic District of Blytheville, Arkansas, encompasses a seven-block residential stretch of West Main Street, which presents a well-preserved history of residential development during the first six decades of the 20th century.
 This time period includes Blytheville's most significant period of growth, which began with the arrival of the railroad in 1900.
 Most of the buildings in the district are residential wood-frame structures, one and two stories in height.
 Most of the buildings, including some that are no longer historically significant due to later alterations, where built between 1900 and 1930.
 Stylistically, the district includes a cross-section of architectural styles popular in the early 20th century, although there are a significant number of vernacular structures.
 The district extends from North 6th Street to Division Street, and includes fifty buildings, of which almost all are residential.
The Tongan archipelago has been inhabited for perhaps 3000 years, since settlement in late Lapita times.
 The culture of its inhabitants has surely changed greatly over this long time period.
 Before the arrival of European explorers in the late 17th and early 18th centuries, the Tongans were in frequent contact with their nearest Oceanic neighbors, Fiji and Samoa.
 In the 19th century, with the arrival of Western traders and missionaries, Tongan culture changed dramatically.
 Some old beliefs and habits were thrown away and others adopted.
 Some accommodations made in the 19th century and early 20th century are now being challenged by changing Western civilization.
 Hence Tongan culture is far from a unified or monolithic affair, and Tongans themselves may differ strongly as to what it is "Tongan" to do, or not do.
The following is a timeline of the Gwangmu Reform, which was a reforms for modernize Korea from the late 19th century to the early 20th century.
 Although many people have the notion that this period was marked with the fight for power between Heungseon Daewongun (흥선대원군, 興宣大院君 - King Gojong's father) and Queen Min (King Gojong's wife), it was rather the era of great changes relevant to modernisation after the harsh oppressive years during the "Regency" of King Gojong's father.
 This reform also was one of the most successful for modernising in a short period of time during Korean history.
 Although the reform was mostly centred on the time period after the proclamation of the Korean Empire, it includes a number of other previous events that are closely related to the reform.
Frank "Bomp" Bompensiero (October 29, 1905 – February 10, 1977) was a Mafia hitman and longtime Caporegime in the Los Angeles crime family.
 In 1956, with the death of boss Jack Dragna, Bompensiero was demoted to the rank of soldier by the new boss, Frank DeSimone.
 He was the older brother of associate Salvatore "Sam" Bompensiero.
 Bompensiero made a name for himself for the many killings he committed on the orders of his superiors.
 Jimmy Fratianno, a close associate, once said that Bompensiero "had buried more bones than could be found in the brontosaurus room of the Museum of Natural History."

Question: Frank Bompensiero, who served a senior role under this mafia, who was active in both Italy and the United States in the 20th century in bootlegging during what time period?
Answer: the Prohibition Era