Kaiserslautern in the context of Master of Nördlingen

Rhineland-Palatinate (/ˌraɪnlænd pəˈlætɪnɪt, -lənd-/ RYNE-land pə-LAT-in-it, -⁠lənd-, US also /-ɪneɪt/ -⁠in-ayt; German: Rheinland-Pfalz [ˌʁaɪnlant ˈpfalts] ; Luxembourgish: Rheinland-Pfalz [ˌʀɑɪ̯nlɑm ˈpfɑlts]; Palatine German: Rhoilond-Palz) is a western state of Germany. It covers 19,846 km (7,663 sq mi) and has about 4.05 million residents. It is the ninth largest and sixth most populous of the sixteen states. Mainz is the capital and largest city. Other cities are Ludwigshafen am Rhein, Koblenz, Trier, Kaiserslautern, Worms, and Neuwied. It is bordered by North Rhine-Westphalia, Saarland, Baden-Württemberg and Hesse and by France, Luxembourg and Belgium.

Rhineland-Palatinate was established in 1946 after World War II, from parts of the former states of Prussia (part of its Rhineland and Nassau provinces), Hesse (Rhenish Hesse) and Bavaria (its former outlying Palatinate kreis or district), by the French military administration in Allied-occupied Germany. Rhineland-Palatinate became part of the Federal Republic of Germany in 1949 and shared the country's only border with the Saar Protectorate until the latter was returned to German control in 1957. Rhineland-Palatinate's natural and cultural heritage includes the extensive Palatinate winegrowing region, picturesque landscapes, and many castles and palaces.

Palatine German (Standard German: Pfälzisch [ˈp͡fɛlt͡sɪʃ] , endonym: Pälzisch) is a group of Rhine Franconian dialects spoken in the Upper Rhine Valley, roughly in the area between Zweibrücken, Kaiserslautern, Alzey, Worms, Ludwigshafen am Rhein, Mannheim, Odenwald, Heidelberg, Speyer, Landau, Wörth am Rhein and the border to Alsace and Lorraine, in France, but also beyond.

The English term Palatine refers to the Palatinate region (German: Pfalz). Almost all traditional dialects of the Palatinate belong to the Palatine dialect group, but the Palatine speech area also extends to the west and east into neighboring regions (Saarland, Kurpfalz, southern Hesse). The main dialect divisions within Palatine German are Westpfälzisch (also called Hinterpfälzisch) and Vorderpfälzisch (also called Ostpfälzisch).

Kaiserslautern is a district (Kreis) in the south of Rhineland-Palatinate, Germany. Neighboring districts are (from west clockwise) Kusel, Saarpfalz-Kreis, Donnersbergkreis, Bad Dürkheim and Südwestpfalz. The city of Kaiserslautern is almost fully enclosed by, but not belonging to the district.

Operation Undertone, also known as the Saar-Palatinate Offensive, was a large assault by the U.S. Seventh, Third, and French First Armies of the Sixth and Twelfth Army Groups as part of the Allied invasion of Germany in March 1945 during World War II.

A force of three corps was to attack abreast from Saarbrücken, Germany, along a 75-kilometre (47 mi) sector to a point southeast of Hagenau, France. A narrow strip along the Rhine leading to the extreme northeastern corner of Alsace at Lauterbourg was to be cleared by a division of the French First Army under operational control of the Seventh Army. The Seventh Army's main effort was to be made in the center up the Kaiserslautern corridor.

The County Palatine of Veldenz was a principality in the contemporary Land Rhineland-Palatinate with full voting rights to the Reichstag. The county was located partially between Kaiserslautern, Sponheim and Zweibrücken, partially on the Mosel in the Archbishopric of Trier. A municipality of the same name, Veldenz, and a castle, Schloss Veldenz, are located in the district of Bernkastel-Wittlich.

Sembach Kaserne (lit. 'Sembach Barracks') is a United States Army post in Donnersbergkreis, Germany, near Kaiserslautern. It is approximately 19 miles (31 km) east of Ramstein Air Base. From 1995 to 2012 the installation was a United States Air Force installation known as Sembach Air Base, until it was transferred to the United States Army. Prior to 1995 it was known as Sembach Air Auxiliary Field.

Named for the municipality of Sembach, it is the home of AFN Europe, U.S. Army Europe Band, 10th Army Air and Missile Defense Command, Medical Readiness Command-Europe, 68th Medical Group, U.S. Army NATO Brigade, 18th Military Police Brigade, 30th Medical Brigade, United States Army Corrections Facility-Europe, DoDEA Europe, and AAFES Europe, Africa, and Southwest Asia. During the Cold War, the installation housed a variety of U.S. tactical reconnaissance, close air support and tactical air control units as a front line NATO air base.