How many letters does the top answer for “a hostile meeting of opposing military forces in the course of a war” have?

The most common answer is battle (6 letters).

Crossword clue: a hostile meeting of opposing military forces in the course of a war

3 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

battle 6 letters wn-def

a hostile meeting of opposing military forces in the course of a war

engagement 10 letters wn-def

a hostile meeting of opposing military forces in the course of a war

fight 5 letters wn-def

be engaged in a fight; carry on a fight