This is the 5735th most frequent Turkish word.
savaşan
"Fighting" or "warrior."
Here, 'savaşan' is used as an adjective to describe 'askerler' (the soldiers) as those who are engaged in a fight.
Savaşan askerler özgürlük için mücadele ediyor.
The soldiers fighting are struggling for freedom.
In this sentence, 'savaşan' serves as an adjective qualifying 'toplumlar' (societies) to mean those that are involved in a war.
Savaşan toplumların ekonomik sorunları artabilir.
The societies engaging in war may face increasing economic problems.
Here, 'savaşan' describes 'bireyler' (individuals) as involved in a fight or struggle.