What type of flag is described as a banner?

A banner is typically defined as a flag that prominently displays a symbol, motto, or other significant messages. The choice describing a rectangular flag used by nobility aligns with this definition, as such flags often have historical ties to heraldry and represent the authority or identity of a noble house. Banners historically serve both ceremonial and symbolic purposes, showcasing values or allegiances, which fits well with the traditional use of flags in conjunction with nobility.

In contrast, flags with specialized military insignia are more focused on military identification and signaling rather than the broader representation of nobility. Personal flags for commissioned officers are specific to individuals and often carry personal insignia rather than the broader themes associated with banners of nobility. Temporary flags used during drills relate mainly to training and specific operational procedures rather than the traditional essence of what a banner signifies in terms of heritage and noble representation.