How is a First Lieutenant ranked in terms of O classifications?

A First Lieutenant holds the rank of O-2 in the U.S. Army's officer classification system. This system categorizes officer ranks based on a scale where O-1 represents the lowest officer rank and O-10 represents the highest. The progression of ranks typically starts from O-1 with Second Lieutenant, followed by O-2 for First Lieutenant. This classification is important for understanding the roles, responsibilities, and expected levels of authority associated with various officer ranks, which is crucial for leadership and operational effectiveness within the military. The ranks above O-2, such as O-3 (Captain) and O-4 (Major), denote more senior positions with greater responsibilities and higher levels of command.