Most of these incidents took place near either the Korean Demilitarized Zone (DMZ) or the Northern Limit Line (NLL).
A total of 3,693 armed North Korean agents have infiltrated into South Korea between 1954 and 1992, with 20% of these occurring between 1967 and 1968.
In 1977 North Korea claimed an Exclusive Economic Zone over a large area south of the disputed western maritime border, the Northern Limit Line in the Yellow Sea.
[3] As of January 2011, North Korea had violated the armistice 221 times, including 26 military attacks.
In 1976, in now-declassified meeting minutes, U.S. Deputy Secretary of Defense William Clements told Henry Kissinger that there had been 200 raids or incursions into North Korea from the south, though not by the U.S.