The Korean Geotechnical Society (KGS) has prepared a report to flash back to the geotechnical engineering milestones in the past 70 years that are regarded as the driving forces for Korea's economic growth and current prosperity as a Member Society contribution to the International Society for Soil Mechanics and Geotechnical Engineering (ISSMGE) Time Capsule Project (TCP). The KGS hopes that this report will serve as a resource for societies and nations that are on a similar path as the KGS and the Republic of Korea.