Which significant change was made to the official logo of the United States Department of Defense (Pentagon) during its 2008 rebranding?

Throughout military history, logos and insignia have played a crucial role in unit identification, morale building, and organizational branding. The Pentagon, as headquarters of the United States Department of Defense, has maintained a distinctive visual identity that communicates authority and national security. This trivia question explores how military organizations have developed and evolved their visual branding over time—a fascinating intersection of military history and design principles.

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The addition of a gold eagle with spread wings atop the Pentagon building
The replacement of the five-sided Pentagon building with a shield design
The inclusion of all five military branches (Army, Navy, Air Force, Marines, Coast Guard) within the logo
The removal of stars and stripes in favor of a minimalist monochrome design