 Mivo ; meanwhile , the Japanese continued to harass the Australians , probing their positions and setting mines and traps , targeting the Australian line of communications . On 9 July , the 15th Infantry Battalion fought off a series of attacks around Siskatekori , at the junction of the Mivo River and the Buin Road , which included a heavy Japanese artillery bombardment . Australian patrols were resumed in late July and continued into August . These attacks proved very costly , particularly amongst the Australian engineers that were tasked with rebuilding the bridges and roads that had been destroyed in the flooding .   Fighting in the northern sector continued during this time also , and although preparations in the south for the final advance towards Buin continued into August , combat operations on the island ceased as the war came to an end before these were completed . As a result , the final Australian operations on Bougainville took place on the Ratsua front in the northern sector , where the Australians had been conducting a holding action since the failed landing at Porton Plantation had forced them to abandon plans for an advance into the Bonis Peninsula . By mid @-@ August , however , following the dropping of two atomic bombs on Hiroshima and Nagasaki and Japan 's subsequent unconditional surrender , a cease fire was ordered on the island and although there were minor clashes following this , it spelt an end to major combat operations .   Following the end of the war , the Australian Army awarded three battle honours for the fighting around the Hongorai River . The 2 / 4th Armoured Regiment , and the 9th , 24th , 57th / 60th and 58th / 59th Infantry Battalions received the battle honour " Hongorai River " . A second battle honour — " Egan 's Ridge – Hongorai Ford " — was also awarded to the 2 / 4th Armoured Regiment , and the 24th and 58th / 59th Infantry Battalions for the second stage of the fighting , while the 57th / 60th Infantry Battalion received the separate battle honour of " Commando Road " for this period .   = Sonic the Hedgehog ( 1991 video game ) =   Sonic the Hedgehog is a platform video game developed by Sonic Team and published by Sega for the Sega Genesis console . The game was first released in North America , Europe and Australia in June 1991 , and in Japan the following month . The game features an anthropomorphic hedgehog named Sonic in a quest to defeat Dr. Robotnik , a scientist who has imprisoned animals in robots and stolen the magical Chaos Emeralds . Sonic the Hedgehog 's gameplay involves collecting rings as a form of health and a simple control scheme , with jumping and attacking controlled by a single button .   The game 's development began in 1990 , when Sega ordered its AM8 development team to create a game featuring a mascot for the company . After considering a number of suggestions , the developers decided on a blue hedgehog with spikes along his head and spine and renamed themselves " Sonic Team " to match their character . Sonic the Hedgehog , designed for fast gameplay , was influenced by the games of Super Mario series creator , Shigeru Miyamoto . Sonic the Hedgehog uses a novel technique that allows Sonic 's sprite to roll along curved scenery , which originated in a tech demo created by the game 's programmer , Yuji Naka .   The game was well received by critics , who praised its visuals , music , and speed of gameplay . The game was also commercially successful , establishing the Genesis as a key player in the 16 @-@ bit era and allowing it to compete with Nintendo and their Super NES console . It has been ported a number of times , and inspired several clones , a successful franchise , and adaptations by other media .   = = Plot = =   In an attempt to steal the six Chaos Emeralds and harness their power , the game 's antagonist , Dr. Ivo Robotnik , has trapped the animal inhabitants of South Island in aggressive robots and stationary metal capsules . The player controls Sonic , who aims to halt Robotnik 's plans by freeing his animal friends and collecting the emeralds himself .   If the player collects all the Chaos Emeralds and completes the game , a reward ending sequence is shown . If all the emeralds are not collected , Robotnik taunts the player while juggling the Chaos Emeralds instead .   = = Gameplay = =   Sonic the Hedgehog is a 2D , side @-@ scrolling platformer , whose gameplay centers around Sonic 's ability to run at high speed through levels incorporating springs , slopes , high falls , and loop @-@ the @-@ loops . The levels contain hazards in the form of robots ( " badniks " in the Western game manuals ) inside of which Dr. Robotnik has trapped animals . Although destroying a robot frees the animal within , this is not required to complete the game . The player must avoid rows of sharp spikes , falling into bottomless pits , being crushed by moving walls or platforms , and drowning ( which can
ĠM ivo Ġ; Ġmeanwhile Ġ, Ġthe ĠJapanese Ġcontinued Ġto Ġharass Ġthe ĠAustralians Ġ, Ġprobing Ġtheir Ġpositions Ġand Ġsetting Ġmines Ġand Ġtraps Ġ, Ġtargeting Ġthe ĠAustralian Ġline Ġof Ġcommunications Ġ. ĠOn Ġ9 ĠJuly Ġ, Ġthe Ġ15 th ĠInfantry ĠBattalion Ġfought Ġoff Ġa Ġseries Ġof Ġattacks Ġaround ĠS isk ate k ori Ġ, Ġat Ġthe Ġjunction Ġof Ġthe ĠM ivo ĠRiver Ġand Ġthe ĠBu in ĠRoad Ġ, Ġwhich Ġincluded Ġa Ġheavy ĠJapanese Ġartillery Ġbombardment Ġ. ĠAustralian Ġpatrols Ġwere Ġresumed Ġin Ġlate ĠJuly Ġand Ġcontinued Ġinto ĠAugust Ġ. ĠThese Ġattacks Ġproved Ġvery Ġcostly Ġ, Ġparticularly Ġamongst Ġthe ĠAustralian Ġengineers Ġthat Ġwere Ġtasked Ġwith Ġrebuilding Ġthe Ġbridges Ġand Ġroads Ġthat Ġhad Ġbeen Ġdestroyed Ġin Ġthe Ġflooding Ġ. Ġ Ġ ĠFighting Ġin Ġthe Ġnorthern Ġsector Ġcontinued Ġduring Ġthis Ġtime Ġalso Ġ, Ġand Ġalthough Ġpreparations Ġin Ġthe Ġsouth Ġfor Ġthe Ġfinal Ġadvance Ġtowards ĠBu in Ġcontinued Ġinto ĠAugust Ġ, Ġcombat Ġoperations Ġon Ġthe Ġisland Ġceased Ġas Ġthe Ġwar Ġcame Ġto Ġan Ġend Ġbefore Ġthese Ġwere Ġcompleted Ġ. ĠAs Ġa Ġresult Ġ, Ġthe Ġfinal ĠAustralian Ġoperations Ġon ĠBou gain ville Ġtook Ġplace Ġon Ġthe ĠRats ua Ġfront Ġin Ġthe Ġnorthern Ġsector Ġ, Ġwhere Ġthe ĠAustralians Ġhad Ġbeen Ġconducting Ġa Ġholding Ġaction Ġsince Ġthe Ġfailed Ġlanding Ġat ĠPort on ĠPlant ation Ġhad Ġforced Ġthem Ġto Ġabandon Ġplans Ġfor Ġan Ġadvance Ġinto Ġthe ĠBon is ĠPeninsula Ġ. ĠBy Ġmid Ġ@ - @ ĠAugust Ġ, Ġhowever Ġ, Ġfollowing Ġthe Ġdropping Ġof Ġtwo Ġatomic Ġbombs Ġon ĠHiroshima Ġand ĠNag asaki Ġand ĠJapan Ġ' s Ġsubsequent Ġunconditional Ġsurrender Ġ, Ġa Ġcease Ġfire Ġwas Ġordered Ġon Ġthe Ġisland Ġand Ġalthough Ġthere Ġwere Ġminor Ġclashes Ġfollowing Ġthis Ġ, Ġit Ġsp elt Ġan Ġend Ġto Ġmajor Ġcombat Ġoperations Ġ. Ġ Ġ ĠFollowing Ġthe Ġend Ġof Ġthe Ġwar Ġ, Ġthe ĠAustralian ĠArmy Ġawarded Ġthree Ġbattle Ġhon ours Ġfor Ġthe Ġfighting Ġaround Ġthe ĠHong or ai ĠRiver Ġ. ĠThe Ġ2 Ġ/ Ġ4 th ĠArm oured ĠRegiment Ġ, Ġand Ġthe Ġ9 th Ġ, Ġ24 th Ġ, Ġ57 th Ġ/ Ġ60 th Ġand Ġ58 th Ġ/ Ġ59 th ĠInfantry ĠBatt alions Ġreceived Ġthe Ġbattle Ġhonour Ġ" ĠHong or ai ĠRiver Ġ" Ġ. ĠA Ġsecond Ġbattle Ġhonour ĠâĢĶ Ġ" ĠE gan Ġ' s ĠRidge ĠâĢĵ ĠHong or ai ĠFord Ġ" ĠâĢĶ Ġwas Ġalso Ġawarded Ġto Ġthe Ġ2 Ġ/ Ġ4 th ĠArm oured ĠRegiment Ġ, Ġand Ġthe Ġ24 th Ġand Ġ58 th Ġ/ Ġ59 th ĠInfantry ĠBatt alions Ġfor Ġthe Ġsecond Ġstage Ġof Ġthe Ġfighting Ġ, Ġwhile Ġthe Ġ57 th Ġ/ Ġ60 th ĠInfantry ĠBattalion Ġreceived Ġthe Ġseparate Ġbattle Ġhonour Ġof Ġ" ĠCommando ĠRoad Ġ" Ġfor Ġthis Ġperiod Ġ. Ġ Ġ Ġ= ĠSonic Ġthe ĠHedge hog Ġ( Ġ1991 Ġvideo Ġgame Ġ) Ġ= Ġ Ġ ĠSonic Ġthe ĠHedge hog Ġis Ġa Ġplatform Ġvideo Ġgame Ġdeveloped Ġby ĠSonic ĠTeam Ġand Ġpublished Ġby ĠSega Ġfor Ġthe ĠSega ĠGenesis Ġconsole Ġ. ĠThe Ġgame Ġwas Ġfirst Ġreleased Ġin ĠNorth ĠAmerica Ġ, ĠEurope Ġand ĠAustralia Ġin ĠJune Ġ1991 Ġ, Ġand Ġin ĠJapan Ġthe Ġfollowing Ġmonth Ġ. ĠThe Ġgame Ġfeatures Ġan Ġanthrop omorphic Ġhedge hog Ġnamed ĠSonic Ġin Ġa Ġquest Ġto Ġdefeat ĠDr . ĠRobot nik Ġ, Ġa Ġscientist Ġwho Ġhas Ġimprisoned Ġanimals Ġin Ġrobots Ġand Ġstolen Ġthe Ġmagical ĠChaos ĠEmerald s Ġ. ĠSonic Ġthe ĠHedge hog Ġ' s Ġgameplay Ġinvolves Ġcollecting Ġrings Ġas Ġa Ġform Ġof Ġhealth Ġand Ġa Ġsimple Ġcontrol Ġscheme Ġ, Ġwith Ġjumping Ġand Ġattacking Ġcontrolled Ġby Ġa Ġsingle Ġbutton Ġ. Ġ Ġ ĠThe Ġgame Ġ' s Ġdevelopment Ġbegan Ġin Ġ1990 Ġ, Ġwhen ĠSega Ġordered Ġits ĠAM 8 Ġdevelopment Ġteam Ġto Ġcreate Ġa Ġgame Ġfeaturing Ġa Ġmascot Ġfor Ġthe Ġcompany Ġ. ĠAfter Ġconsidering Ġa Ġnumber Ġof Ġsuggestions Ġ, Ġthe Ġdevelopers Ġdecided Ġon Ġa Ġblue Ġhedge hog Ġwith Ġspikes Ġalong Ġhis Ġhead Ġand Ġspine Ġand Ġrenamed Ġthemselves Ġ" ĠSonic ĠTeam Ġ" Ġto Ġmatch Ġtheir Ġcharacter Ġ. ĠSonic Ġthe ĠHedge hog Ġ, Ġdesigned Ġfor Ġfast Ġgameplay Ġ, Ġwas Ġinfluenced Ġby Ġthe Ġgames Ġof ĠSuper ĠMario Ġseries Ġcreator Ġ, ĠSh iger u ĠMiy amoto Ġ. ĠSonic Ġthe ĠHedge hog Ġuses Ġa Ġnovel Ġtechnique Ġthat Ġallows ĠSonic Ġ' s Ġsprite Ġto Ġroll Ġalong Ġcurved Ġscenery Ġ, Ġwhich Ġoriginated Ġin Ġa Ġtech Ġdemo Ġcreated Ġby Ġthe Ġgame Ġ' s Ġprogrammer Ġ, ĠYu ji ĠN aka Ġ. Ġ Ġ ĠThe Ġgame Ġwas Ġwell Ġreceived Ġby Ġcritics Ġ, Ġwho Ġpraised Ġits Ġvisuals Ġ, Ġmusic Ġ, Ġand Ġspeed Ġof Ġgameplay Ġ. ĠThe Ġgame Ġwas Ġalso Ġcommercially Ġsuccessful Ġ, Ġestablishing Ġthe ĠGenesis Ġas Ġa Ġkey Ġplayer Ġin Ġthe Ġ16 Ġ@ - @ Ġbit Ġera Ġand Ġallowing Ġit Ġto Ġcompete Ġwith ĠNintendo Ġand Ġtheir ĠSuper ĠNES Ġconsole Ġ. ĠIt Ġhas Ġbeen Ġported Ġa Ġnumber Ġof Ġtimes Ġ, Ġand Ġinspired Ġseveral Ġclones Ġ, Ġa Ġsuccessful Ġfranchise Ġ, Ġand Ġadaptations Ġby Ġother Ġmedia Ġ. Ġ Ġ Ġ= Ġ= ĠPlot Ġ= Ġ= Ġ Ġ ĠIn Ġan Ġattempt Ġto Ġsteal Ġthe Ġsix ĠChaos ĠEmerald s Ġand Ġharness Ġtheir Ġpower Ġ, Ġthe Ġgame Ġ' s Ġantagonist Ġ, ĠDr . ĠI vo ĠRobot nik Ġ, Ġhas Ġtrapped Ġthe Ġanimal Ġinhabitants Ġof ĠSouth ĠIsland Ġin Ġaggressive Ġrobots Ġand Ġstationary Ġmetal Ġcapsules Ġ. ĠThe Ġplayer Ġcontrols ĠSonic Ġ, Ġwho Ġaims Ġto Ġhalt ĠRobot nik Ġ' s Ġplans Ġby Ġfreeing Ġhis Ġanimal Ġfriends Ġand Ġcollecting Ġthe Ġemer ald s Ġhimself Ġ. Ġ Ġ ĠIf Ġthe Ġplayer Ġcollects Ġall Ġthe ĠChaos ĠEmerald s Ġand Ġcompletes Ġthe Ġgame Ġ, Ġa Ġreward Ġending Ġsequence Ġis Ġshown Ġ. ĠIf Ġall Ġthe Ġemer ald s Ġare Ġnot Ġcollected Ġ, ĠRobot nik Ġt aunts Ġthe Ġplayer Ġwhile Ġjuggling Ġthe ĠChaos ĠEmerald s Ġinstead Ġ. Ġ Ġ Ġ= Ġ= ĠGame play Ġ= Ġ= Ġ Ġ ĠSonic Ġthe ĠHedge hog Ġis Ġa Ġ2 D Ġ, Ġside Ġ@ - @ Ġscrolling Ġplatform er Ġ, Ġwhose Ġgameplay Ġcenters Ġaround ĠSonic Ġ' s Ġability Ġto Ġrun Ġat Ġhigh Ġspeed Ġthrough Ġlevels Ġincorporating Ġsprings Ġ, Ġslopes Ġ, Ġhigh Ġfalls Ġ, Ġand Ġloop Ġ@ - @ Ġthe Ġ@ - @ Ġloops Ġ. ĠThe Ġlevels Ġcontain Ġhazards Ġin Ġthe Ġform Ġof Ġrobots Ġ( Ġ" Ġbad ni ks Ġ" Ġin Ġthe ĠWestern Ġgame Ġmanuals Ġ) Ġinside Ġof Ġwhich ĠDr . ĠRobot nik Ġhas Ġtrapped Ġanimals Ġ. ĠAlthough Ġdestroying Ġa Ġrobot Ġfre es Ġthe Ġanimal Ġwithin Ġ, Ġthis Ġis Ġnot Ġrequired Ġto Ġcomplete Ġthe Ġgame Ġ. ĠThe Ġplayer Ġmust Ġavoid Ġrows Ġof Ġsharp Ġspikes Ġ, Ġfalling Ġinto Ġbottom less Ġpits Ġ, Ġbeing Ġcrushed Ġby Ġmoving Ġwalls Ġor Ġplatforms Ġ, Ġand Ġdrowning Ġ( Ġwhich Ġcan