This is the 17523rd most frequent Turkish word.
i̇şgalcilerin
"İşgalcilerin" means "of the occupiers" in English.
In this sentence, the word 'işgalcilerin' refers to 'the occupiers' (possessive plural form) and indicates the ones conducting the invasions.
İşgalcilerin saldırıları kasabayı harap etti.
The invasions of the occupiers devastated the town.
Here, 'işgalcilerin' is a possessive plural form indicating 'of the occupiers', denoting ownership as in 'their soldiers'.
Halk, işgalcilerin askerlerini püskürttü.
The people repelled the soldiers of the occupiers.
In this sentence, 'işgalcilerin' shows possessiveness, referencing the history belonging to the occupiers.