INSARAG Asia-Pacific Regional Earthquake Response Exercise was held in Ulaanbaatar, Mongolia from 22 to 26 June, with 130 participants from more than 20 countries/organizations, This exercise was the first exercise after the endorsement of the INSARAG Guidelines 2015, and the participants had a chance to practice the new INSARAG Marking and Assessment Forms. In the 2-day simulation exercise, they tested the worst-case scenario of natural disasters in Mongolia, a massive earthquake in Ulaanbaatar city in winter season. NEMA Mongolia tested its national response system, including how to receive international assistance.