Although Yemen Arab Republic and People’s Democratic Republic of Yemen unified at the end of Cold War era -reminding Germany case in Europe-, the fact that Yemeni people consisted of groups belonging to different factions, inequality to reach resources and power, continual marginalization policy and disputes related to superiority among tribes, hampered the establishment of sustainable stability in newly founded Yemen Republic. The combination of direct/indirect intervention of regional/ global Powers with the sensitiveness derived from fragile interior structure of the country, which has limited capacity, makes impossible to function the state mechanism effectively in Yemen located on a strategic place checking the South Entrance of Gulf of Aden-Bab el Mandeb Strait-Red sea-Suez Channel waterline. The ongoing conflict environment in the country has potential to create important results in terms of regional and global security. Collapse of state system in Yemen is not unexpected contingency in case the responsibility of stability undertaken by international community via “National Dialogue Conference” doesn’t conclude successively. Insecure environment coming into existence after such a development will affect not only Yemen and regional countries, but also all countries taking advantage of Gulf of Aden-Bab el Mandeb Strait-Red sea waterline, Sunni-Shia tension will increase even more in the Middle East, terrorist structures will gain strength, proliferation of small arms and light weapons in global scale will get easier