The user wants a detailed article on the topic «Комиссар 398 стрелкового полка убит» (Commissar of the 398th Rifle Regiment killed).
The user provided some snippets of internet search results, but none of them directly mention the «398th Rifle Regiment» or its commissar being killed. The snippets mention:
— Yakov Fabritsius (drowned 1930)
— 316th Rifle Division (Panfilov)
— 39th Guards Motor Rifle Division
— General definition of Commissar
— Death of HQ of 339th Rifle Regiment (Stalingrad, Commissar Svirin)
— Political instructor Vasily Klochkov (316th Div)
— Upper Tura memorial book (1943)
— 246th Rifle Division (Rzhev, Division Commissar N.)
— 308th Rifle Division (mentioned in the 339th snippet)
— «Memory of the People» portal
— FSB publication: «1 October heroically died commissar of the regiment of the division Sizov Vasily Alekseevich» (no regiment number specified in snippet).

The specific query «Комиссар 398 стрелкового полка убит» does not have a direct match in the provided context. The provided context is noisy and mostly irrelevant to the specific 398th Rifle Regiment.

Wait, the prompt says: «Информация из интернета по этой теме: [snippets]». It implies I should use this info. But the info doesn’t match the topic.
Strategy:

Acknowledge the topic: Commissar of the 398th Rifle Regiment killed.
State that the provided search snippets do not contain direct information about the 398th Rifle Regiment’s commissar.
Provide a structured article based on general historical context of commissars in WWII, the structure of rifle regiments, and how to find this specific information (archives, «Memory of the People», etc