The South Korean air force operates 840 aircraft, making it world's ninth largest air force, including several types of advanced fighters like F-15K, heavily modified KF-16C/D, and the indigenous T-50 Golden Eagle, supported by well-maintained fleets of older fighters such as F-4E and KF-5E/F that still effectively serve the air force alongside the more modern aircraft. In an attempt to gain strength in terms of not just numbers but also modernity, the commissioning of four Boeing 737 AEW&C aircraft, under Project Peace Eye for centralized intelligence gathering and analysis on a modern battlefield, will enhance the fighters' and other support aircraft's ability to perform their missions with awareness and precision.