This is the 6070th most frequent Russian word.
союзникам
"Союзникам" means "to allies" in English.
In this sentence, 'союзникам' is in the dative case, indicating the indirect object of the sentence, referring to 'our allies'.
Мы отправили помощь нашим союзникам.
We sent aid to our allies.
Here, 'союзникам' is in the dative case, used after the verb 'доверяю', which requires this grammatical form to indicate the people the trust is directed towards.
Я доверяю своим союзникам в этой миссии.
I trust my allies in this mission.
In this example, 'союзникам' is in the dative case, part of the prepositional construction 'для союзников', showing who the information is important to.