This paper intends infer what the US will do with North Korea who already suc­ceeded in possessing nuclear weapons from the past China's nuclear development case. During the 1950s to 1960s, when China was developing nuclear weapons, US took various counter-measures to block China's nuclear development. Not only did US consider international efforts to resolve peacefully by signing international agree­ments for non-proliferation, but also US considered military attack in cooperation with the Soviet Union against China's effort for weaponization. This was very similar to the policy US exercised against North Korea's nuclear development. In the end, how­ever, all Washington's policies failed. Recalling this lessons, This paper will suggest South Korea need to prepare aggressive policies for the worst case of US possible policy toward North Korea denuclearization.

The Trump Administration has consistently stressed that the Indo-Pacific is the pri­ority theater and the most consequential region for the U.S. The Department of Defense's 2019 Indo-Pacific Strategy Report is important in that it is the first strategy report containing the Trump administration's awareness of the strategic environment in the Indo-Pacific region and the specific ways in which it can be implemented. This paper attempts to analyze how the U.S. Grand Strategy and military and security strategy under the Trump administration are reflected in the Indo-Pacific strategy and policy based on the 2019 Indo-Pacific Strategy Report It also reviews the constraints that may be involved in implementing this. Based on this analysis, the implications and policy implications for South Korea are drawn.

This study is an attempt to supplement existing research on North Korean military research during the Kim Jong-un era, where various differences are disputed. This study, in particular, seeks to overcome the limitations of existing discussions, which were concentrated mainly on the relative status of the armed forces in the framework of party-military relations. Of course, it is true that this view is very important in the study of the socialist army. But that alone is insufficient to capture changes in its unique functions and roles that are not covered by the military's status change.
Based on this assessment, this study seeks to utilize Huntington's professionalism concept. It also seeks to utilize Pearl Mutter's concept of “revolutionary army”, which introduces a more sophisticated model of Huntington's concept. Through these con­cepts, this study attempts to analyze the role and function changes of the North Korean military during the Kim Jong-un era. This study, in particular, attempted to objectively capture the above-mentioned changes through three measures: expertise, responsibility and corporateness.

The aircraft carrier has been regarded as one of the least effective naval weapons in responding the threat from the North Korea, in Korea. Therefore, ROK Navy and it's proponents have been developed their persuasive logics for the carrier acquisition heavily based on the external variables. As a result, this situation has restricted our understanding of the usefulness of the carrier as a 'mobile airfield' in the Korean op­erational environment. Considering the fact that the aircraft carrier conducted very significant role in the Korean War, it is very interesting that it's usefulness has rarely known in Korea. As the Korean aircraft carrier programme was officially included in the five-year defense blueprint, it is needed to re-examine the forgotten lessons gained from the War.
For these purposes, this thesis explores the historical conflict between 'the North's threat' and the pursuit of the 'Ocean-going Navy'. It then examines the usefulness of the carrier by analysing the naval air operation conducted during the early stage of the Korean War. Finally, based on the lessons gained from the War, this thesis seeks to show the ongoing value of the aircraft carrier as a complementary military force of the land-based Air Power.

Cyber psychological warfare has become a major threat to national security by not only distinguishing the war and peace, but also targeting the military as well as the private sector, undermining the general will that forms the basis of Korea and society. Indeed, despite the ongoing psychological warfare by external forces such as North Korea, the cybercrime warfare organization and functions of the US military have been greatly reduced after the so-called “political commentary incident”, and there is concern that the operation will be left behind. Therefore, this study tried to define the concept of cyber psychological warfare by examining the meaning of psy­chological warfare and adding the characteristics of cyber space. Through this, the basis of cyber psychological warfare was examined. Especially, in view of democratic principles and legal grounds, it was necessary to recognize the necessity of clearer operational grounding and control in order to carry out internal cyber psychological warfare.

The purpose of the entrance examination is to select promising and potential stu­dents who could understand each curriculum in the university. Therefore, each uni­versity focuses on researching and developing the entrance examination system for recruiting talented students. Likewise, the entrance examination of Korea military Academy is not only important, but also more significant in terms of selecting poten­tial officers for the future. Furthermore, the selection system adds to an interview and physical strength test in order to evaluate the volunteer's character and aptitude.
It is clear that the unique system closely correlates with prominent officer for the future. In this regard, this study analyzes the correlation between the academic ach­ievement of cadets and the entrance policy factors that could verify predictive reli­ability for admission factors such as former grade point average, high school's aca­demic achievements, aptitude test battery for cadets, English test, interview and phys­ical strength test. Finally, it provides the significant implications in terms of useful tools for the entrance policy in Korea military Academy.

The purpose of this research is to provide practical evidences needed to enhance the labor management system of host-country nationals. In South Korea, the korean employees in the USFK have become a key alliance issue as it develops into an important subject in the SMA negotiations. And, there is a growing social interest about its labor management system.
Therefore, this research provides the understanding of the labor manage­ment system of host-country nationals in South Korea by comparing it with Japan's. South Kore and Japan are the only countries that share defense costs by signing the special measure agreement. The labor management au­thority, function, and organization are used to compare and analyze the labor management system.