united_states corps united_states_army operational history headquartered japan subordinate army commands far_east created following world war corps activated use world war years later corps spent world war charge defenses west_coast united_states moving hawaii plan organize operations forces advancing pacific following end war participated occupation mainland japan corps combat came korean war best known exploits senior command commanding line forces numerous war corps served lines conflict took command combat divisions time following end korean war remained korea years moved japan corps spent years administrative command army forces overseeing administrative functions combat finally consolidated history headquarters constituted july organized reserves new corps formation intended compliment existing corps commands active duty component force providing command reserve units assigned shoulder sleeve insignia shortly corps activated remained organizational rolls army called needed october corps moved active duty roster remained world war corps headquarters finally activated october fort lewis washington large buildup army response conflicts world immediately began training combat units preparation deployment year later took command camp murray staging area washington responsible training forces addition responsibilities training active duty reserve units following japanese attack pearl harbor late assigned defensive duties west_coast united_states specifically central northern regions coast corps oversaw defenses west_coast majority war moved georgia preparation deployment overseas planning corps trained fort preparation deployment september corps closed headquarters fort moved hawaii arrived hawaii corps command tenth united states army assigned missions primarily concerned plans invasion coastal regions japanese held china later early placed charge preparing rest movement okinawa preparation invasion island launched april general army took overall command corps moved assigned sixth united_states_army july corps tasked planning operation downfall invasion mainland japan specifically island tasked planning occupation japan surrendered assigned corps command strength divisions force men serve reserve force initial invasion assault launched japan surrendered august following use nuclear weapons hiroshima nagasaki occupation following surrender assigned command occupation forces northern island transferred headquarters october occupation duties years period terms surrender supervised enforced japanese military installations material seized troops disarmed discharged weapons warfare disposed duties occupation force included conversion industry foreign nationals supervision complex features phases japanese government economics education industry occupation duties accomplished occupation force continued troops returned home units left japan occupation force reduced commanding corps strength divisions corps commanding 24th commanding moved occupation forces shifted result march command responsibilities consolidated units korean war months later korean war began units japan began streaming south_korea taking charge conflict requested activation corps headquarters growing command forces activated august illinois personnel transferred headquarters arrived perimeter korea september operational day took command took charge western flank perimeter defending area attacking north korean units amphibious landings hit north korean forces allowing break corps north south days later corps troops pushed northward enemy opposition establish contact forces 7th driving southward major elements destroyed cut aggressive penetration link effected south september offensive continued northwards past seoul 38th parallel october momentum attack maintained race north korean capitol ended october elements south korean entered city advance continued unexpectedly enemy resistance october chinese prisoners taken corps troops end october city miles border north_korea captured advanced center army corps west coast operating independently east commanders hoped offensive end war christmas chinese intervention november china entered war north_korea chinese attacks immediately launched troops corps chinese forces penetrating corps rear exposed east flank advance overwhelmed sides chinese forces 40th elements 38th november december division completely destroyed lost virtually heavy equipment vehicles suffering men killed missing western flank hit overwhelming chinese forces 39th facing strong attacks suffering heavy casualties losses equipment battle river spared losses escaping river suffered heavy casualties ordering complete withdraw south 38th parallel having devastated overwhelming chinese force retreated western coast safety wake retreat disorganized formed 2nd 25th infantry divisions suffered losses divisions designated combat ineffective relegated reserve rebuild assigned south korean 6th corps american forces reinforced point battalions greece philippines 27th january chinese troops attacked line forcing miles allowing chinese capture seoul chinese eventually advanced far supply lines adequately support attack stalled battered chinese assault began prepare spring retake lost ground retreating chinese forces able rest following establishment defenses south capital city general ordered conduct general chinese forces january corps advanced north center line sides corps advance steadily northward protected heavy artillery close air support captured seoul corps tasked capturing southeast seoul providing support corps encountered stiff resistance chinese forces dug hilly country combat february chinese forces established machine gun nests mined roads slow corps advance response launched hoping pressure force chinese abandon seoul february march corps participated operation killer pushing chinese forces north operation quickly followed retook seoul march operations rugged april saw forces advance north 38th parallel kansas line respectively march 1st reassigned corps given command 7th south korean 2nd place late april chinese launched major counterattack chinese troops assaulted sector lines forces able hold ground chinese broke south korean 6th division destroyed 13th penetrated line threatened american divisions west 1st able drive 13th 24th withdrew april line pushed seoul managed hold second offensive month similarly unsuccessful chinese north korean forces suffered heavy casualties unable push forces corps offensive line north seoul stalemate september launched center line west corps divisions advanced operation commando flanked south korean 2nd 6th divisions 24th advanced past engaging 20th 27th armies attacks fierce enemy resistance strong previous november chinese attempted counter attack unsuccessful point successive saw sides fighting intensely ground sides started peace negotiations january reorganized containing 7th newly arrived months later reorganized south korean 2nd 3rd october chinese forces conducted large offensive sector hilly countryside iron triangle region 38th sent heavy assaults south korean forces guarding hill time chinese forces attacked held miles away hills changed hands times weeks casualties chinese unsuccessful capturing objective withdrew october launched offensive intended improve defensive lines capturing complex hills force chinese lines complex included northeast advanced encountering resistance 15th ensuing hills captured recaptured sides times heaviest fighting year eventually forces withdrew having unsuccessful capturing objectives forces suffered killed chinese suffered killed wounded fighting result battle slight improvement positions chinese positions fortified forces hold ground remainder year chinese forces conducted series smaller raids lines avoiding major conflicts armistice negotiations continued unsuccessfully november chinese launched offensive retake ground lost operations repulsed forces january reorganized time consisted entirely south korean forces retained command south korean gained command south korean 9th infantry division corps maintained position flanked west corps east south korean corps saw major attack lines july divisions fought limited engagements usually company sized formations attacking defending fortified positions chinese end war major attacks corps conducted armistice signed july ending war korea following armistice remained lines korea case hostilities erupted january reassigned camp 1950s november years signing armistice headquarters left lines moving okinawa divisions command shifted command headquarters consolidation forces region merged army command form joint command element january command oversaw administrative duties forces area february moved mainland japan okinawa merged form corps january army previously late 1940s formed previous split 9th regional support command subordinate command 9th regional support command independent unit continued operate closely received distinctive unit insignia following consolidation forces area army command disbanded merged form consolidated command forces western pacific region responsibilities included administrative oversight forces conducting training exercises units region major change army command organizational structure pacific occurred conjunction return okinawa japanese control seven years administration united_states complex reorganization accompanied headquarters transferred okinawa headquarters form headquarters camp japan headquarters okinawa established command support army units perform theater functions united_states allied forces pacific years remained region conducting training oversight army forces area deployed support army remained command component point lineage corps assumed activated place lieutenant general commanding general deputy governor commanding general army deputy governor commanding general army high commissioner lieutenant general commanding general army high commissioner commanding general commanding general post study computers active april october honors awarded campaign service world war campaign unit decorations service korean war total unit decorations operational history unit decorations campaign
IX Corps (United States)