Which of the following is NOT one of the five phases of an amphibious operation?

The five phases of an amphibious operation are strategic in nature and essential to understanding how the Marine Corps prepares for and executes these complex missions. The correct answer highlights that "Deployment" is not classified as one of the five specific phases.

The phases of an amphibious operation typically include:

1. Planning - This phase involves thorough preparation and coordination to create an operational plan that addresses potential challenges and operational goals.

2. Rehearsal - In this phase, the units engage in practice runs to ensure that all participants understand their roles and the operational procedures, which enhances readiness and reduces confusion in the actual operation.

3. Movement Ashore - This phase involves the actual transit of forces from sea to land, focusing on the execution of the landing and initial establishment of a foothold.

The term "Deployment" generally refers to a broader concept that encompasses the mobilization and transportation of forces to a designated area of operations but does not specifically represent one of the distinct phases as outlined in amphibious operations. Understanding these phases is crucial for planning and executing successful amphibious assaults, which is a key component of Marine Corps capabilities.