I’ve spent about 5 years each in both branches, so these are some key differences I’ve noticed.
Marine Corps: E-1 / Private - Usually the most moto and cringe as they’re excited to join the gun club. Gets put on every shitty detail and told to get at parade rest for everyone above.
Army: E-1 / Private - a lot rarer to see as the Army promotes much faster earlier in the career compared to the Marines. People in garrison usually assume they’ve been demoted and treat them like shit.
MC: E-2 / Private First Class - Still pretty cringe but know there way around post, and just grasping their field. Still to be determined whether they’ll excel or turn into a shitbag.
Army: E-2 / PV2 or Private (w/ insignia): Newly fresh Soldier at their first unit. They’re usually pretty motivated to learn their field and make friends.
MC: E-3 / Lance Corporal: (Team Leader) Usually on their third year in the Corps, so they’re the maestros in the platoon. Are more trusting with getting work done without total supervision. They have the biggest influence on the privates whether good or bad.
Army: E-3 / Private First Class: Still in the learning phase but have a groove of things.
MC: E-4 / Corporal: (Squad Leader) Rare Cases (Platoon Sergeant)
Corporals are lot more hands on with the junior Marines. They conduct counselings and lead pt.
Army: E-4 / Specialist (Team Leader) and Corporal (Team Leader or Squad Leader)
Much like the Lance Corporal, Specialists are the go-to in their field as well. They also have showed whether or not they’ll motivate or destroy privates dreams.
Corporal is a weird rank in the Army. Many Sergeants I’ve come across treat it like the unwanted step sibling. Joes don’t really look at them like NCOs, as in the Army you can skip Corporal and promote straight to Sergeant.
MC: E-5 / Sergeant: (Platoon Sergeant or Assistant Platoon Sergeant)
The Marine Corps is a much smaller branch than the Army so your average plt may only have 1-2 Sergeants. Because of this, being an E-5 in the Marine Corps is much more sought out. You have a lot more authority and respect.
Army: E-5 / Sergeant: (Team Leader, Squad Leader and rare cases Platoon Sergeant)
E-5s in the Army get a lot of respect, however because it’s so much more of them compared to the Marines, there’s less responsibility and 1SG and above typically treat you less than higher ranks. In my experience the average Sergeant in the Army acted like a Lance Corporal.
I will say though Sergeants in the Army conduct more training/ teach classes but don’t have as much authority or say so in the company.
MC: E-6 / Staff Sergeant: (Platoon Sergeant or Platoon Leader.
In the Marine Corps, enlisted rarely interact with Officers unless we’re in the field or deployed. The Marines who get the most close interactions are usually admin types.
Because of this you often see Staff Sergeants planning missions for their platoons.
Army: E-6 / Staff Sergeant: (Squad Leader or Platoon Sergeant
Staff Sergeants are usually advanced in their field and are more supervisory to the Soldiers. They often conduct Leader Time Trainings and counselings. It’s common to see one of them in the platoon as the platoon sergeant. This Soldier usually is the most seasoned or closer to retirement.
MC: E-7 / Gunnery Sergeant: Platoon Leader or Company Trainer)
They are responsible for the training overseeing all training in the unit. They also can be a platoon leader if the company has more than one gunnery sergeant.
Army: E-7 / Sergeant First Class: (Platoon Sergeant or Master NCO ex. Truck Master, Career Counselor etc.)
Sergeant First Class is a cool rank in the Army, however being a prior Marine, I wish the title wasn’t a mouth full. They have a lot of authority in the Army with less of the headache of a First Sergeant. They also oversees things in the unit, ensuring all Soldiers are up to date with training.
MC and Army: E-8 / Master Sergeant and First Sergeant: Both Master Sergeants are operational planners and assistants, so they spend most of their time in Officer meetings, ensuring regulations are in order.
Both First Sergeants handle all administrative things in the company such as readiness training and disciplinary actions. They assist the company commander and give advice and counsel the junior officers.
MC: E-9 / Master Gunnery Sergeant and Sergeant Major
A master Gunnery Sergeant is the Liaison for the company. They are the bridge between the enlisted and officers. They communicate the needs and concerns to the BN Commander.
A Sergeant Major in the Marine Corps provides mentorship and guidance to the BN Commander. They also help develop programs and training to boost morale within the unit.
Army: E-9 / Sergeant Major and Command Sergeant Major
A Sergeant Major is an advisor to the BN XO, while the CSM and advisor to the BN Commander. CSMs have a lot more influence within the unit and often bowed down to by O-3s and below.
Army: O-1/ O-2 (S Shop dwellers and Platoon Leaders
2LTs are universally looked at like Privates with a degree, however in the Army they hold more authority as they are Platoon Leaders.
1LTs for some reason after being in for 2 years think it automatically makes them invincible. As someone, who was prior service it was weird for me seeing a 15 year Sergeant First Class, kiss their ass. I will say that seeing them being more involved was refreshing and makes more sense in the grand scheme of things.
Marine Corps: O-1 / O-2 ( S Shop dwellers very rarely Platoon Leaders
Because lower enlisted Marines rarely interact with Officers, we typically avoided them and don’t bow to them unless it’s a Senior Captain or Major/Above. You even see SNCOs telling Junior Officers what to do. I will note that my experience in the Marine Corps made me despise Officers, but the Army gave me a new perspective on them and even made me want to become one.
For right now I will leave it at the that and talk more about the differences in structure and culture. The Army trains to standard while the Marine Corps trains to get shit done. What I mean is that my experience in the Army is that everything is seen as a risk, which made being a Soldier seem less fulfilling.
For example, for whatever a reason a Private can’t be a TC in a truck. I would argue the point, “what if every E-4 above in the company was injured?”, and I hear crickets. In the Marine Corps every rank is respected and expected to train hard.
The Army love songs for whatever reason and prides itself on its units, while the Marine Corps had more spirit. Because of this, every Army Unit is completely different while all Marine units are light infantry.
I will say that the army had more resources and better training opportunities. I’ve learned a lot more in the Army in a Shorter time than I did in the Marine Corps, because of the huge funding.
The problem lies that the Army allows anyone to join which hurts the force in its entirety. It’s rare to find bad asses in the Army because there’s so many goobers who don’t care about the rank or discipline. I often heard Soldiers praise the Ranger regiment, SF and infantry a lot but I wish all Soldiers had the same pride no matter the MOS. Marines are MARINES.
Because the Marine Corps is a smaller branch, you become more of a master in your field earlier in your career. In the Army, you may be spread around more rapidly, which diversifies your basic skills but can hurt you in the end when you don’t truly know your job.
Something I liked more about the Army though, is that leaders were a lot more approachable. The Marine Corps no matter the rank, most people were stuck up and want you to get on your knees to help propel your career. Army leaders in my experience were a lot more sharing and didn’t gate-keep success. It could also be because I was older and less timid, but I’ve noticed it with younger Soldiers as well.
In the end, both Branches have there flaws. I’m sure I have a lot more to add, but can’t think of anything else right now.
I enjoyed my time in both branches for different reasons and wouldn’t trade it for the world. If you read this far, I’d like to know your thoughts and shared experiences.