Which operation is recognized as the greatest air deployment in history, culminating in over 20,500 airlift missions?

The operation recognized as the greatest air deployment in history, culminating in over 20,500 airlift missions, is Operation Desert Shield. This operation took place during the Gulf War in 1990-1991 when the United States and coalition forces mobilized to deter Iraqi aggression in Kuwait. The scale and complexity of the airlift involved was unprecedented at the time, with massive logistical efforts to transport troops, equipment, and supplies necessary to support military operations.

Operation Desert Shield was characterized by the deployment of a large number of forces to the region, which included airlift missions that played a critical role in quickly establishing a military presence. The success of these airlift operations set a precedent for future military engagements, showcasing the efficacy of air mobility in modern warfare.

While the other operations listed are significant in their own rights, they do not match the sheer number of airlift missions executed during Operation Desert Shield.