Rubuta ci gaba don wannan sakin layi - A farkon Afrilu 1945, 'yan makonni kafin yakin ya ƙare
, kuma suna fama da matsanancin karancin kwararrun ma'aikata saboda kisan kiyashi na yaƙi, hukumomin sojoji sun ɗauki Iwan Katz daga sansanin taro don yin aiki a matsayin likitan soja ga rukunin a garin. Ba a bayyana ba ko ya taɓa samun ƙwarewar likita har zuwa wannan lokacin, amma Medicine na ɗaya daga cikin batutuwan da ya yi karatu a jami'a shekaru talatin da rabi da suka gabata. A ranar 20 ga Afrilu 1945, an ba shi mukamin Babban Likita ga rukunin Jamus da ke Mauthausen. Majiyoyi sun yaba da rawar da ya taka wajen tabbatar da cewa lokacin da sojojin Amurka suka isa farkon Mayu 1945 an ba da Fortress na Mauthausen ba tare da harbi ba daga kowane gefe. Katz ya kasance a matsayin likita tsakanin 6 ga Mayu da 7 ga Yuni, 1945, yana kula da abokan aikinsa daga sansanin taro mai yawa, yanzu ba sojojin Jamus ba ne amma sojojin Amurka ne suka yi aiki.