The term "fresh troop" can be replaced with several other synonyms depending on the context of the sentence. Some of the commonly used synonyms for "fresh troop" include "new recruits," "raw soldiers," "rookie soldiers," "greenhorns," and "newcomers." These synonyms indicate a group of soldiers who have recently joined the military or are relatively inexperienced in combat. Other synonyms that can be used in certain contexts include "fresh troops," "recently enlisted soldiers," and "new blood." Each of these synonyms highlights a group of soldiers who possess certain characteristics that differentiate them from seasoned veterans and can be used effectively in military contexts and discussions.