Final answer:
The Regimental Distinctive Insignia (RDI) is worn on the collar of a military uniform. It represents a specific unit and is a symbol of pride and identification. The placement can vary depending on the branch and regulations.
Step-by-step explanation:
The Regimental Distinctive Insignia (RDI), also known as unit crest or unit insignia, is worn on the collar of a military uniform. The RDI is a metal emblem or device that represents a specific unit within the military. It serves as a symbol of pride and identification for the unit and is typically worn on both sides of the collar.
The RDI is placed on the right collar point for Army officers and on the left collar point for enlisted personnel. However, the exact placement can vary depending on the branch and specific regulations. The RDI is often displayed alongside other insignias and rank insignias.
For example, in the United States Army, the RDI is worn on the right collar of the Class A uniform, while on the Army Combat Uniform (ACU), it is worn on the right shoulder pocket flap.