This is the 5655th most frequent Polish word.
wojennym
"Wojennym" means "war-related" or "pertaining to war."
The word 'wojennym' here functions as an adjective, modifying the noun 'konfliktu' to specify its nature as related to a war.
Podczas konfliktu wojennym życie ludzi było trudne.
During the wartime conflict, people's lives were difficult.
In this sentence, 'wojennym' again acts as an adjective describing 'stylem', emphasizing the thematic focus on war in the museum exhibits.
Muzea wojennym stylem przedstawiają historię konfliktów.
Museums present the history of conflicts in a wartime style.
Here 'wojennym' serves as an adjective modifying 'ofiarom', clarifying the context that these victims are related to occurrences of war.