For a small-scale conflict:
* Guerra pequeña: Literally translates to "small war"
* Enfrentamiento menor: Means "minor confrontation"
* Pelea: Means "fight" or "quarrel," can be used for a small-scale conflict.
* Escaramuza: Means "skirmish," refers to a brief, minor battle.
For a metaphorical "war":
* Guerrilla: This refers to a small-scale, unconventional warfare, often conducted by a group of irregular fighters.
* Lucha: Means "struggle" or "fight," can be used for a metaphorical "war" against something.
* Batalla: Means "battle," can be used metaphorically for a challenging situation.
For a humorous, lighthearted use:
* Guerra de palabras: Means "war of words," refers to a verbal argument.
* Guerra de almohadas: Means "pillow fight," a playful and harmless fight.
The best word to use will depend on the specific context of the "little war" you're referring to.