had happened
Su declaración se correspondía con lo que realmente había sucedido.
His statement corresponded with what had actually happened.
Pensé que algo horrible había sucedido.
I thought something horrible had happened.
Creyó que algo le había sucedido al niño.
He thought something had happened to the child.
— Вор (1997)
Nadie sabía lo que había sucedido.
Nobody knew what had happened.
Creí por un momento que Tom realmente iba a contarle a María qué había sucedido.
For a moment, I thought Tom was really going to tell María what had happened.