This is the 17581st most frequent Russian word.
трупами
"Трупами" means "by/with corpses" (plural instrumental case of "труп" - corpse).
The word 'трупами' is used in its instrumental case plural form to refer to several corpses, emphasizing their presence and the soldiers' reaction.
На поле боя находилось много трупов, и солдаты не знали, как с ними быть.
On the battlefield, there were many corpses, and the soldiers did not know what to do with them.
The term 'трупами' used here describes the byproduct of the disaster in an instrumental plural form, illustrating the aftermath and setting details.
Трупами услали берега реки после масштабного наводнения.
The riverbanks were strewn with corpses after the massive flood.
Here, 'трупами' in instrumental plural form is used academically, discussing the subject matter related to corpses historically and medically.