Training groups, also known as cadres, are groups of people who come together to learn a particular skill or set of skills. They are often used in the military, but can also be found in other areas such as education, business, and sports. Cadres are typically composed of individuals with similar backgrounds and experiences, and they work together to develop their skills and knowledge. The goal of training groups is to create a cohesive unit that can work together to achieve a common goal.