Combate vs. lucha vs. pelea

In Spanish, 'combate', 'lucha', and 'pelea' all relate to the concept of fighting or combat, but they are used in different contexts and carry distinct connotations.

Combate

The word 'combate' often refers to formal or organized fights. It is commonly used to describe military engagements or structured sporting events.
El combate entre los dos ejércitos duró tres días.
(The combat between the two armies lasted three days.)
Participaron en un combate de boxeo anoche.
(They participated in a boxing match last night.)

Lucha

'Lucha' implies a broader struggle or fight, which can be physical, emotional, or metaphorical. It is widely associated with resistance or enduring efforts against difficulties.
La lucha por la independencia fue muy difícil.
(The struggle for independence was very difficult.)
Sigue en la lucha contra el cáncer.
(He continues in the fight against cancer.)
La lucha libre es popular en México.
(Wrestling is popular in Mexico.)

Pelea

'Pelea' is generally used to refer to more informal or spontaneous altercations. It is often linked to personal disputes, brawls, or arguments.
Se metieron en una pelea en el bar.
(They got into a fight at the bar.)
La pelea por el control del televisor terminó en gritos.
(The fight over control of the TV ended in shouting.)
Los niños tuvieron una pelea en el patio de la escuela.
(The children had a fight in the schoolyard.)

Summary

'Combate', 'lucha', and 'pelea' all translate to some form of 'fight' or 'combat', but they are used differently. 'Combate' is used for formalized conflicts like military or sport. 'Lucha' covers a broad spectrum of struggles, including metaphoric and enduring battles like those against diseases or social issues. 'Pelea', on the other hand, typically describes informal, often physical altercations between individuals.