The two-week Key Resolve military exercise came to an end on Thursday, but defense ministry spokesman Kim Min-seok said the military will continue to keep close tabs on military movements in the North and will maintain combat readiness.
Launched on March 11th, the Key Resolve military exercise is a computer-based simulation drill that takes place under that assumption that North Korea has launched a full-scale war.
The two-month-long Foal Eagle exercise, which consists of field exercises, is still underway and slated to come to an end on April 30th.
Earlier on Thursday, North Korea set off an air raid siren and ordered all military personnel to be on high-alert.
The siren was turned off after an hour.
Experts say that exercises such as these are carried out to strengthen the sense of unity within the regime and prepare it for conflict amid the rising tensions on the peninsula.
The North unleashed a string of harsh rhetoric after the United States deployed a B-52 bomber during its drills with the South earlier this week.
The B-52 is a strategic bomber jet that is one part of Washington's three-prolonged nuclear umbrella.
And on Wednesday, North Korean leader Kim Jong-un was reported to have supervised a drone attack on a simulated South Korean target.
Yoo Li-an, Arirang News.

Reporter : Lian.yoo@arirang.co.kr