What is fall in line?

"Fall in line" is an idiomatic phrase that means to conform to or comply with rules or expectations. It involves following a prescribed order, either physically or figuratively, in order to achieve a particular goal or purpose. The phrase is often used in military or athletic contexts, where there is a need to maintain discipline and order among a group of individuals. It can also refer to societal standards and norms that individuals are expected to adhere to in order to fit in or be accepted by others. Overall, "falling in line" implies a willingness to work within established structures and systems, without questioning or challenging them.