The show of force involves 12,000 personnel and some of the most advanced aerial weaponry in service. The drill comes as North Korea has recently become increasingly aggressive with its most recent ICBM test and rhetoric.
See the best shots from the drill so far:
F-15s, the king of the skies for 3 decades, are participating in the drill in large numbers
F-35s and F-16s line up together to get into the air.
Six F-22s, rarely seen outside the US or Japan, add more stealth power to the exercise.
18 F-35s in total are in South Korea.
B-1 bombers are also being used in the drills.
Here a B-1 is accompanied by two F-16s, two F-15s, and 4 F-35s.
While the drills will be held over US and South Korean Air Force bases, civilians will be able to see military jets do an occasional fly by
Here, two F-16s from the US Air Force prepare for landing.
Electronic warfare capabilities, demonstrated by the EA-18G Growler, are also involved.
Vigilant Ace will be a great chance to study how the F-35 will is able to perform with non-stealth aircraft, like these F-16s.
There's a lot of F-16s at the drill.
The drills, of course, are not just limited to the ground. Here, South Korean soldiers load up on a vehicle during their shift change at Osan Air Base.
The massive amount of airpower, however, is where most of the attention is going.