The advanced military technology that forms South Korea’s “core” defenses against North Korean nuclear and missile threats lags several years behind comparative systems in the U.S. and other countries, Seoul’s defense ministry states in a new report.

The Defense Strategic Technology Level Research report, published by a think tank under the Defense Acquisition Program Administration (DAPA), states that South Korea is on average six years behind the defense technology across multiple different sectors compared to other countries with similar assets that the ROK military is currently developing.