"Big Seven" refers to the first 7 battleships built to carry the biggest naval guns (> 40 cm) allowed by the [[wikipedia:Washington Naval Treaty|Washington Naval Treaty]], namely, the {{Class|Nagato}}, {{Class|Nelson}}, and {{Class|Colorado}}. | "Big Seven" refers to the first 7 battleships built to carry the biggest naval guns (> 40 cm) allowed by the [[wikipedia:Washington Naval Treaty|Washington Naval Treaty]], namely, the {{Class|Nagato}}, {{Class|Nelson}}, and {{Class|Colorado}}. |