Question: what are the three parts of the marine corps emblem?
Answer: New Marine receives the Eagle, Globe, & Anchor. The Eagle, Globe, & Anchor consists of three parts. The top part is the Eagle.
USMC Enlisted Emblem. The eagle signifies the Marines' commitment to support and defend the Constitution. It also represents the fact that we fight 'in the air. ... 
Honorable John H. Glenn, Jr.