Вот интересная информация о создании этих сторожевых рот на английском языке.
The Baltic guards were established by U.S. Army Major Nathan Moxley who was in charge of physical security of U.S. Army installations in the Nuremberg-Fuertharea, as he could not obtain enough Polish guards. He first unofficially recruited two platoons of Baltic guards in the summer of 1946, and when the arrangement seemed to work, convinced the Commanding General to issue a General Order to Establish the Baltic Labour Service Companies.
United Nations Relief and Rehabilitation Administration (UNRRA) officials who were responsible for the displaced persons also saw in the
constructive employment of the displaced persons an opportunity to weed out ‘spongers’ who apparently were content to stay in the camps as
long as they could get food and shelter without exertion. As a result of the plan, Baltic DPs over 18 were told that they must either go to work or lose their status as displaced persons under UNRRA.
On December 21, 1946 the first three Baltic Companies – 88th (later 4204th) Lithuanian, 90th (later 8920th) Latvian, and 92nd (later 4221st)
Estonian – departed for Mannheim-Kaefertal Labour Service Training Center. Each unit was composed of 8 officers and 268 men.
The most noteworthy mission of the Baltic Companies was to guard the German war criminals at the Nuremberg Prison. The Estonian 4221st Guard Company served there together with the Latvian 8920 Guard Company. Many guards have later confessed that they were guarding their
ex-superiors and as one guard has put it, ‘it was an experience of a lifetime.’
http://webcache.googleusercont...&gl=usВот здесь
http://www.archiv.org.lv/balti...&id=15 есть фото солдата "Gunārs Stopnieks in service. Nürnberg guards’ company No 8920. LVA, 2250. f., 21v. apr., 1. l., 3. lp.
Судя по надписи документы по латвийской сторожевой роте 8920 есть на хранении в ЛНА.
Есть ли что нибудь по этим сторожевым ротам в архиве США я не знаю. Поисковая система архива ничего не выдает. Вы можете обратиться в архив с вопросом о наличии документов по Baltic guards. Если документы есть, они укажут реквизиты документов в которых может быть нужная Вам информация (копии многих документов можно купить в архиве). Будет ли там что-то именно о Вашем дедушке Вам никто не скажет, т.к. архив не занимается поиском информации о конкретных людях.
На сайте архива есть список частных архивистов, которые оказывают услуги по поиску документов в архиве. Эта услуга дорогая.
Обращайтесь