Question: What type of art does Flatland Cavalry and Turnpike Troubadours have in common?

Context paragraphs:
Type 41 75 mm cavalry gun: The Type 41 75 mm cavalry gun was a Japanese field gun first accepted into service in 1908.  Type 41 designation was given to this gun as it was accepted in the 41st year of Emperor Meiji's reign (1908).  It was slightly lightened version of the Type 38 75 mm field gun that was based on a 1905 Krupp design.  It was the primary weapon of artillery units attached to cavalry formations.  Although effectively obsolete by the start of World War II it was used in limited numbers despite nominally being replaced by the Type 95 75 mm field gun.

Harquebusier: The harquebusier was the most common form of cavalry found throughout Western Europe during the early and mid 17th century.  Early harquebusiers were characterised by the use of a form of carbine, called a "harquebus".  In England, harquebusier was the technical name for this type of cavalry, though in everyday usage they were usually simply called 'cavalry' or 'horse'.  In Germany they were often termed "ringerpferd", or sometimes "reiter", in Sweden they were called "lätta ryttare".

New York Central Mohawk: The New York Central Railroad (NYC) called the 4-8-2 type of steam locomotive the Mohawk type.  It was known as the "Mountain" type on other roads, but the mighty New York Central didn't see the name to be fitting on its famous Water Level Route, so it instead picked the name of one of those rivers its rails followed, the Mohawk River, to name its newest type of locomotive.  Despite the more common name, the 4-8-2 was actually suited in many ways more to flatland running than slow mountain slogging, with its 4-wheel leading truck for stability at speed.

Polish hussars: The Polish Hussars ( , , or ; Polish: "Husaria" ), or Winged Hussars, were one of the main types of the cavalry in the Polish-Lithuanian Commonwealth between the 16th and 18th centuries.  When this cavalry type was first introduced by Serbian and Hungarian mercenary horsemen at the beginning of the 16th century, they served as light cavalry banners in the Polish army; by the second half of the 16th century and after Stephen Báthory's reforms, hussars had been transformed into heavily armored shock cavalry.  Until the reforms of the 1770s, the husaria banners were considered the elite of the Polish cavalry.

Flatland Cavalry: Flatland Cavalry is a country and Americana band from Lubbock, Texas.  The band consists of vocalist Cleto Cordero, drummer Jason Albers, bassist Jonathan Saenz, guitarist Reid Dillon, and fiddler Laura Jane.  Flatland Cavalry was formed in 2012 by Cordero and Albers, who were college roommates in Midland and performed together before moving to Lubbock, where the rest of the members came together by 2014.  In May 2015, the band's debut EP, titled "Come May", was released after a crowd-funding campaign was used to finance its production.  On April 1, 2016, their first full-length album, "Humble Folks", was released to positive reviews and comparisons to the music of the Turnpike Troubadours.  "Humble Folks" peaked at number 17 on the Billboard Americana/Folk albums chart and number 38 on the Top Country Albums chart.

Canso (song): The canso or canson or canzo (] ) was a song style used by the troubadours; it was, by far, the most common genre used, especially by early troubadours; only in the second half of the 13th century would its dominance be challenged by a growing number of poets writing "coblas esparsas".

Type 92 Heavy Armoured Car: The Type 92 Heavy Armoured Car (九二式重装甲車 , Kyū-ni-shiki Jyū-sōkōsha ) , also known as the Type 92 cavalry tank, was the Empire of Japan's first indigenous tankette.  Designed for use by the cavalry of the Imperial Japanese Army by Ishikawajima Motorcar Manufacturing Company (currently Isuzu Motors), the Type 92 was designed for scouting and infantry support.  Although actually a light tank, it was called "sōkōsha" (armored car) in Japanese due to political sectionalism within the Japanese Army (tanks were controlled by the infantry, whereas the new weapon was intended for the cavalry).  Exactly the same device was used in America with the M1 Combat Car.

Rytterskole: A rytterskole (English: "rider school" or "cavalry school") was a type of school erected in Denmark in the years 1721–1727 for the education of common children.  The schools were located in 12 cavalry districts established in 1715–1718, during the Great Nordic War, to reform and improve the cavalry in Denmark, from which the schools got their name.  They were not military schools, as the name might suggest, but rather a predecessor to the Danish public schools founded in 1814.

Turnpike Troubadours: Turnpike Troubadours is an American country music group from Oklahoma founded in 2005.  They started their own imprint, Bossier City Records, in 2007 and have released four studio albums.  Their self-titled 2015 album peaked at number 17 on the "Billboard" 200.

André Giroux (painter): André Giroux (April 30, 1801 in Paris – November 18, 1879) was a renowned French photographer and painter.  His paintings were mostly Landscape art and Genre painting, one of which hangs in the Metropolitan Museum of Art.  In particular, he restored several Genre paintings of medieval ruins and troubadours. Giroux was also a well established art dealer and gave up painting to promote his business selling curiosities.  Giroux's work is extensively discussed in Steven Adams' doctoral thesis from the University of Leeds in 2003.

Supporting paragraphs: Flatland Cavalry Turnpike Troubadours
Answer: music