The CH-53D Sea Stallion is a heavy-lift transport helicopter developed by Sikorsky Aircraft. It was introduced to service to meet the United States Marine Corps’ need for a helicopter capable of transporting heavy equipment, troops, and supplies, and was used extensively in the Vietnam War.

Here are some of its key features and uses:

Heavy-lift capability: The CH-53D is capable of lifting substantial loads, including vehicles, artillery, and other heavy equipment.

Troop transport: It can carry a large number of troops, making it valuable for amphibious assaults and troop deployments.

Cargo transport: The helicopter can transport supplies both internally and externally, supporting logistical operations.

Versatile operations: The CH-53D is shipboard compatible and can operate in various weather conditions, day or night.

Roles: It has served in diverse roles, including assault support, combat support, and humanitarian missions.

Replacement: The CH-53D was eventually succeeded by the CH-53E Super Stallion, which features increased power and lift capacity.