"Comrade-in-Arms" refers to a person who shares a close bond with another, particularly in a military or combat context. This term emphasizes loyalty, camaraderie, and mutual support among individuals facing challenges together, often in high-stress situations. The phrase is commonly used to describe soldiers who fight alongside each other, highlighting their shared experiences and sacrifices. It can also extend to non-military contexts, symbolizing solidarity among individuals working towards a common goal, such as in activism or team sports.