A defensive wall is a fortification used to protect a city or settlement from potential aggressors. In ancient to modern times, they were used to enclose settlements. Generally, these are referred to as city walls or town walls, although there were also walls, such as the Great Wall of China, Hadrian's Wall, and the metaphorical Atlantic Wall, which extended far beyond the borders of a city and were used to enclose regions or mark territorial boundaries. Beyond their defensive utility, many walls also had important symbolic functions — representing the status and independence of the communities they embraced.

Existing ancient walls are almost always masonry structures, although brick and timber-built variants are also known. Depending on the topography of the area surrounding the city or the settlement the wall is intended to protect, elements of the terrain (e.g. rivers or coastlines) may be incorporated in order to make the wall more effective.

Walls may only be crossed by entering the appropriate city gate and are often supplemented with towers. In the Middle Ages, the right of a settlement to build a defensive wall was a privilege, and was usually granted by the so-called "right of crenellation"^{[citation needed]} on a medieval fortification. The practice of building these massive walls, though having its origins in prehistory, was refined during the rise of city-states, and energetic wall-building continued into the medieval period and beyond in certain parts of Europe.

Paul Michael Slayton (born March 11, 1981), better known by his stage name Paul Wall, is an American rapper. He is currently affiliated with Swishahouse Records, having released several albums under the label as well as collaborating with other rappers signed to the label. He was formerly musical partners with rapper Chamillionaire releasing several collaborative albums including the independently released Get Ya Mind Correct. In 2005, he was signed to Atlantic Records and became successful with his major-label debut The Peoples Champ. Get Money, Stay True followed in 2007.

Wall attended Jersey Village High School and studied mass communications at the University of Houston for three years. After proposing to do promotions for Michael "5000" Watts' company, Swishahouse, Chamillionaire and Paul Wall came to Watts' studio, KBXX. Paul & Chamillionaire convinced Watts to let them rap on his radio show and put the verses on one of his mixtapes. That mixtape was titled Choppin Em Up Part 2, which was released in mid 1999. The freestyle became so popular in the streets that Chamillionaire and Paul Wall became regular staples on Houston's mixtape circuit, appeared on several of Watts' mixtapes and became permanent members of Swishahouse.

The Pogues are an Irish rock band from London, formed in 1982 and fronted by Shane MacGowan. The band reached international prominence in the 1980s and early 1990s. MacGowan left the band in 1991 due to drinking problems but the band continued first with Joe Strummer and then with Spider Stacy on vocals before breaking up in 1996. The band reformed in 2001, and has been playing regularly ever since, most notably on the US East Coast around St Patrick's Day and across the UK and Ireland every December. The group has yet to record any new music and, according to Spider Stacy on Pogues.com, has no inclination to do so.

Their politically tinged music was informed by MacGowan and Stacy's punk backgrounds, yet used traditional Irish instruments such as the tin whistle, cittern, mandolin and accordion.

The Pogues were founded in Kings Cross, a district of North London, in 1982 as Pogue Mahone—pogue mahone being the Anglicisation of the Irish póg mo thóin, meaning "kiss my arse".

The roots of The Pogues were formed when MacGowan (vocals), Peter "Spider" Stacy (tin whistle), and Jem Finer (banjo) were together in an occasional band called The Millwall Chainsaws in the late 1970s after MacGowan and Stacy met in the toilets at a Ramones gig at The Roundhouse in 1977. MacGowan was already with The Nips, though when they broke up in 1980 he concentrated a bit more on Stacy's Millwall Chainsaws who changed their name to The New Republicans. During this period MacGowan and Finer auditioned unsuccessfully for a licence to busk at Covent Garden. In 1982 James Fearnley (accordion) joined MacGowan, Stacy, and Finer, calling the band Pogue Mahone. The new group played their first gig at The Pindar of Wakefield on 4 October 1982.

The Oppressed is a Welsh anti-fascist Oi! band that formed in 1981 in Cardiff. Most of the musicians in the band's various lineups were skinheads. Throughout the band's career, the members (especially vocalist Roddy Moreno) openly expressed opposition to racism and fascism — in their lyrics, interviews, on-stage comments and other actions. In 1989, Moreno visited New York City and met a few members of Skinheads Against Racial Prejudice (SHARP). On his return to the United Kingdom, he started promoting SHARP ideals to British skinheads. The band has also had ties to other anti-racist groups, such as Anti-Fascist Action. Moreno is a Cardiff City F.C. supporter, and some of the band's songs express that support.

The band has split and re-formed several times. Their more recent split was in 2006, but they re-formed in 2009, and continue performing today. Roddy Moreno - Vocals / Guitar. Dom Moreno - Bass. Steve Floyd - Guitar. Tony Kizmus - Drums.