Recent maritime data reveals that the US Air Force has conducted 43 military cargo flights from Japan and South Korea to the United States between February 12 and March 21. Notably, the number of flights surged following the commencement of the US-Israeli war on Iran on February 28.
The analysis of the data was based on tracking air traffic through the Flight Radar platform, which indicated that 31 flights originated from Japan and 12 flights from South Korea, all operated by US Air Force aircraft.
Details of the Military Operations
These flights are critically important as they originate from the Yokota Air Base and Iwakuni Marine Base, both of which are key logistical hubs in the Indian and Pacific Ocean regions. Additionally, Osan Air Base serves as the primary air cargo center on the Korean Peninsula, highlighting the integration of these operations with the infrastructure of the US military support network in the region.
The chronological distribution of the flights indicates a significant increase in the early days of the conflict, with only 6 flights recorded between February 12 and 27, while the number surged to 37 flights from March 1 to 21, demonstrating an acceleration in military air cargo operations.
The first week of the war saw intense activity, with 5 flights recorded on March 6, 6 flights on March 7, and 4 flights each on March 5 and 10, providing a clear indication of the scale of military shipments.
Background & Context
The Boeing C-17 Globemaster III aircraft leads the flights, with a total of 37 flights, followed by the Lockheed C-5M with 3 flights, as well as several C-130 aircraft with similar flight numbers. These aircraft play a vital role in the US military logistical framework, with the C-17 and C-5 designated for transporting heavy military cargo, while the C-130 is used for smaller quantities of personnel and equipment.
The declared maximum payload capacity of the C-17 is approximately 77.5 tons, while the C-5M has a capacity of 127.5 tons. The upper limits for C-130 aircraft vary by model but typically range from 19.1 to 20 tons.
Impact & Consequences
This aerial activity has increased pressure on US defense stockpiles, with reports of discussions between Seoul and Washington regarding the potential redeployment of some of the Patriot missile systems stationed in South Korea. Meanwhile, the US military in the region issued a statement that did not address the movement of military capabilities due to operational reasons.
Despite this, the South Korean president confirmed on March 10 that the country cannot prevent US forces from redeploying weapons currently on its territory, amid indications that some of these capabilities may be directed towards the Middle East.
Regional Significance
These movements coincide with US efforts to ramp up ammunition production to replenish depleted stockpiles, as an agreement was announced on January 6, 2026 to raise production capacity of the PAC-3 MSE missiles to 2000 missiles annually. Additionally, on January 29, a separate agreement was documented to increase production of THAAD missiles from 96 to 400 missiles annually.
These decisions demonstrate a clear direction from the United States to enhance its defensive capabilities in response to escalating challenges.
In conclusion, the data and analyses indicate that the volume of US military shipments from Asia to the United States has risen to unprecedented levels, reflecting a shift in the dynamics of US military support during times of war and conflict.