Brigade
A brigade is a military unit having its headquarters and consisting of two or more regiments, squadrons, groups, or battalions [Dictionary].
A brigade is a significant tactical military formation that typically comprises three to six battalions plus supporting elements. It is roughly equivalent to an enlarged or reinforced regiment. Two or more brigades may constitute a division.
Brigades formed into divisions are usually infantry or armored (sometimes called combined arms brigades). In addition to combat units, they may include combat support units or sub-units, such as artillery, engineers, and logistic units. Historically, such brigades have sometimes been called brigade groups. On operations, a brigade may comprise both organic elements and attached elements, including some temporarily attached for a specific task.
Brigades may also be specialized and comprise battalions of a single branch, for example, cavalry, mechanized, armored, artillery, air defense, aviation, engineers, signals, or logistics. Some brigades are classified as independent or separate and operate independently from the traditional division structure. The typical NATO standard brigade consists of approximately 5,000 troops. However, the numbers could start as high as 10,000 troops in Switzerland and Austria. The Soviet Union, its forerunners and successors, primarily used "regiment" instead of brigade, which was common in much of Europe until after World War II [Wikipedia].
Brigade. Wikipedia. Retrieved from: https://en.wikipedia.org/wiki/Brigade
Brigade. Dictionary. Retrieved from: https://www.dictionary.com/browse/brigade