When greeting a group of the same gender, what terms should be used?

Using "Ladies or Gentlemen" when greeting a group of the same gender is correct because it reflects a level of formality and respect that is suitable in a professional or military context. This phrase is traditionally used to address groups in a manner that acknowledges the presence of both genders while also maintaining an inclusive and respectful tone for the audience.

In contrast, terms like "Comrades or Colleagues" might imply a specific type of relationship or group dynamic often found in more casual or specific environments rather than in formal situations. The use of "Sir or Ma'am" is typically reserved for addressing individuals rather than groups, which would not be appropriate in this context. "Ladies or Friends" dilutes the formal greeting with a more casual term that may not suit all settings, especially in military or official contexts. Hence, the choice of "Ladies or Gentlemen" best maintains the decorum required for addressing a group with respect.