This is the 695th most frequent Spanish word.
dieron
"Did they give" or "they gave."
Here, "dieron" is the third person plural preterite form of "dar," used to indicate an action completed in the past performed by them, specifically giving a gift.
Me dieron un regalo ayer.
They gave me a gift yesterday.
In this sentence, "dieron" refers to circumstances being the subjects of the action "to give rise," indicating a resulted situation.
Las circunstancias dieron lugar a una nueva oportunidad.
The circumstances gave rise to a new opportunity.
"Dieron" here again is 'dar' in third person plural, referring to the action of giving performed by 'them,' specified as giving all their resources.