The rebels were at war with the government forces.
at war
Frequency:
60
%
The army was at war against the invading forces.
at war
Frequency:
50
%
The two tribes were at war over control of the land.
Idiomatic Expressions for at war
Phrase: war of words
Meaning: a conflict or argument fought through verbal attacks and insults
Usage: The debate turned into a heated war of words between the candidates.