Over-the-beach capability refers to a military's ability to operate on land that is near or underwater. When soldiers need to move between bodies of water and land during a mission, they need to have the capability to operate successfully in both environments.
Imagine that you're at the beach and you want to go from swimming in the water to walking on the sand. You have to be able to get from one place to another without getting stuck or slowed down. For military personnel, this also means being able to move heavy equipment, weapons, and vehicles from sea to land.
Military units with over-the-beach capability are trained in special tactics and have specialized equipment that can handle the unique challenges of operating in different environments. They can move quickly and effectively both in the water and on the shoreline, which is crucial for accomplishing missions and executing operations.
Without over-the-beach capability, military forces may be unable to fully operate in areas where land and water intersect. This makes them less effective in combat situations and can limit their ability to complete critical missions.