All of the Japanese Ground Self-Defense Force members engaged in a U.N. peacekeeping mission in South Sudan have returned to Japan, marking the completion of their five-year operation in the conflict-torn country, the Self-Defense Forces said Saturday.The withdrawal of the most recently deployed 350-member unit took place in stages based on the Japanese government's decision announced in March. With no SDF unit serving in active U.N. missions, Tokyo is now considering other ways to contribute to international peace-building efforts.The unit was mainly composed of members of the GSDF's 9th D…READ FULL ARTICLE