A railway gun is a large artillery piece mounted on a railway carriage, allowing it to be transported easily along train tracks. These guns were designed to fire heavy shells over long distances, making them effective for long-range bombardment during warfare. Their mobility provided strategic advantages, enabling quick repositioning to different battlefronts. Railway guns were notably used during both World War I and World War II, with famous examples like the German Dora and the American Baldwin Locomotive Works models. While their effectiveness diminished with advancements in military technology, they remain a significant part of artillery history.