The Marine Corps doesn't have an award which is equivalent to the Army's EIB. You'd have to hold an 11 or 18 series MOS while serving in the Army and pass the EIB testing in order to be eligible to wear it.
You can only wear one at a time - they can't be worn together. With or without a CIB, the only way you'd be authorised to wear the EIB is if you've tested for and were awarded it. If you havn't done this, you can't wear the EIB, even if you have a CIB.
No. The only time this is done is a matter of local policy, where the unit might dictate that those who were awarded the EIB previously (and thus aren't testing for it) wear it during the period in which EIB testing is taking place.
No.
The EIB and the CIB are both military designations. When they have been earned, they can be worn. There is a limitation to the number of medals or ribbons that can be worn on a uniform.
Technically, you have your own discretion to wear whichever one you choose. However, if you've been awarded a CIB, and choose instead to wear an EIB you've earned, you can expect your chain of command to not be particularly thrilled about it.
Yes, a non-infantry officer serving in an 11A slot, which is typically an infantry officer position, can wear the Expert Infantryman Badge (EIB) if they meet the required criteria and successfully complete the EIB testing. The EIB is open to personnel across various Army branches and is based on individual performance, not specific occupational specialties or positions.
The EIB and the CAB are both group one badges. Per AR670-1 you may only where one badge from group one at a time.
Yes. It is a skill badge you were awarded, and you'll always be permitted to wear it, even if you don't remain in the infantry. Just like you would still wear jump wings if you were jump qualified, but serving in a leg unit. You don't lose your EIB simply for reclassing - however, you may have to fight to have the promotion points from your EIB counted at your promotion board, especially if you're going to a POG unit. Those promotion points are still valid, regardless of what MOS you hold at the time of your promotion board - don't forget that.
The EIB or CIB, you can wear after you reclass. The blue cord, however, may not be worn once you reclass, nor are the blue discs worn behind the infantry branch insignia worn with any other branch insignia.
NO. Army Regulation 670-1 specifies that only one badge from group one can be worn at a time. Group one consists of the EIB, CIB and CAB. Combat badges take precedence over skill badges. A soldier having earned both the EIB and CIB must wear the CIB. A soldier having earned both the CIB and CAB may choose which one to wear.
With few exceptions, no. If you earn the EIB (or CIB) as an infantryman, then you reclass to another MOS, you can still wear it. If you earn the EIB as a non-11 series MOS, then reclass to infantry, you should be eligible to wear it. If you test for it as a non-11 Series, and never reclass to infantry, you can't wear it, even if you complete the testing. However, if you do complete the testing, you should be able to use the points towards promotion.
Only if you continue to qualify expert. Otherwise, you wear no marksmanship badge at all.