a)Large numbers of soldiers or troops acting in unison
Explanation:
A battalion can be regarded as military unit, that consist between 300 to 1000 soldiers under the command of a lieutenant colonel, they can be subdivided into a number of companies. Depending on countries
battalions are regarded as infantry exclusively or unit-level organizations. It should be noted that Within A Farewell to Arms, the best definition of “battalions” is "Large numbers of soldiers or troops acting in unison"
