The word peleaban is the imperfect form of pelear in the third person plural.
See the full pelear conjugation

pelear

Mamá, tú y papá peleaban todo el tiempo.
Mom, you and dad fought all the time.
Mis padres peleaban todo el tiempo y patinar era mi escape.
My parents were fighting all the time and skating was an escape.
Eso es por lo que ella y Beck peleaban, por este cuadro.
That's what she and Beck were fighting over, this painting.
Al tercer día, tus soldados se peleaban entre sí.
On the third day, your soldiers turned on each other.
Solía venir aquí cuando mis padres peleaban.
I used to come here when my parents would fight.
Dijo que Carter y Caroline peleaban constantemente.
Said that Carter and Caroline fought constantly.
¿Sabes si tu papá y Kim, peleaban mucho?
Do you know if your dad and Kim, did they fight a lot?
No recuerdo la historia ni por qué peleaban.
I don't really remember the story or why they're wrestling.
Claro, pero ellos se peleaban todo el rato.
Sure, but they fought all the time.
En su pasado antiguo ustedes peleaban por comida, agua y refugio.
In your ancient past you competed and fought for food, water and shelter.
A ella ya no le importaba, y ellos se peleaban todo el tiempo.
She didn't care anymore, and they were fighting all the time.
No podían ayudarme, peleaban con los aldeanos.
They couldn't help me, they were attacked by the peasants.
Ella no podía entender por qué se peleaban.
She could not understand why they fought.
Si se peleaban, íbamos a la cama.
If they fought it was when we went to bed.
No era la primera vez que peleaban, ¿verdad?
It wasn't the first time you had a fight, was it?
No sabíamos que peleaban con los Vaskanos.
We didn't realize you were fighting with the Vaskans.
Las dos hermanas siempre peleaban entre sí.
The two sisters were always quarreling with each other.
Pero siempre peleaban cuando estaban juntos.
But you guys were always fighting when you were together.
La familia estaba siempre tranquila y los padres nunca se peleaban.
The family was always at peace and the parents were never heard quarrelling.
Hace un momento se peleaban por nosotros, ¿qué ha pasado?
They were fighting to take us just now, what happened now?
Want to Learn Spanish?
Spanish learning for everyone. For free.
SpanishDict Premium
Have you tried it yet? Here's what's included:
Cheat sheets
No ads
Learn offline on iOS
Fun phrasebooks
Learn Spanish faster
Support SpanishDict