What were a few ways Sparta and Athens were similar?

Sparta and Athens were both prominent city-states in ancient Greece that shared a common language and religious practices, contributing to a shared cultural identity. Both engaged in military service, though their approaches differed significantly; Athens focused on naval power while Sparta emphasized land-based military strength. Additionally, both city-states participated in the Panhellenic games and contributed to the collective defense against external threats, such as the Persian invasions. Despite their differences in governance and societal structure, these similarities highlight their roles in the broader Greek world.