Which group is popularly known as the "Magnificent Bastards"?

The group popularly known as the "Magnificent Bastards" is the Fifth Marine Regiment. This nickname was earned during World War II, particularly through their actions in the Pacific Theatre, where they demonstrated incredible bravery and effectiveness in battle. The Fifth Marine Regiment distinguished itself in numerous campaigns, including the Battle of Belleau Wood, and their reputation for tenacity and valor led to the affectionate moniker.

The Fourth Marine Regiment, although noteworthy, does not carry this specific nickname. The First Marine Division is the oldest and most decorated division in the Corps but is not referred to by this title. Similarly, the Eighth Marine Regiment, while also distinguished, does not share the same historical association with the "Magnificent Bastards."