MCO 1020.34 - Marine Corps Uniform Regulations

Scope

MCO 1020.34H, Marine Corps Uniform Regulations, governs wear of the uniform across the Marine Corps. Authorized articles, grooming standards, insignia, awards placement, and civilian attire rules. Signed 2018-05-01. The cover reads MARINE CORPS UNIFORM REGULATIONS over PCN 10200150000 with Distribution Statement A. The portal cites the order across its awards pages for precedence and device wear.

Audience

• Every Marine responsible for proper wear of the uniform and awards.
• Senior enlisted leaders verifying uniform configuration before formal events.
• S-1 chiefs and awards clerks validating uniform display after award presentation and initial issue.
• Commanders and leaders coaching Marines on award wear standards.

Content scope

Portal coverage anchored to this order spans order of precedence questions, uniform-by-uniform awards configuration for Service A, Service B, Service C, Blue Dress, and Evening Dress, marksmanship badge wear on Blue Dress and Evening Dress, Combat Action Ribbon placement on Blue Dress A with full-size medals, and replacement of lost or damaged ribbons and medals.

Operative content

• The Marine wears a new award per uniform regulations after presentation, per MCO 1650.19J Enclosure 1 Section 1 paragraph 7 paired with this order on the awards admin page.
• The S-1 validates uniform display against MCO P1020.34H after initial issue, per the awards presentation and initial issue page.
• Awards configuration varies by uniform. Service A, Service B, Service C, Blue Dress, and Evening Dress each carry their own configuration, per the wearing your awards page.
• Marksmanship badge wear on Blue Dress and Evening Dress follows this order. Marines verify with the senior enlisted leader before formal events.
• Order of precedence questions on a specific ribbon arrangement resolve through SECNAV M-1650.1 Chapter 1, this order, and the S-1.

Connection to higher policy

• DoD Instruction 1334.01, Wearing of the Uniform. Named in the comparable grades reference list alongside this order.
• SECNAV M-1650.1, Navy and Marine Corps Awards Manual. Chapter 1 governs order of precedence, Appendix 4A Tab 17 paragraph e governs marksmanship badge wear.
• DoD Manual 1348.33 Volume 3, joint award conventions co-cited on the wearing page.

Connection to Marine Corps doctrine and lower policy

• MCO 1650.19J, Marine Corps awards program administration. The portal pairs its display rules with this order.
• ALNAV 055/17 and MARADMIN 665/17, V, C, and R device placement co-cited on the wearing page.
• MMPB-3 Military Awards Section guidance, cited as a companion source.

Status

Signed 2018-05-01. The MCPEL lists MCO 1020.34H as Current with publication date 2018-05-01. One portal page links a PDF named MCO 1020.34H w CH 1, evidence of a Change 1 in circulation. Source PDF on file from the 2026-06-12 archive refresh, supplied with a working text layer after the original scan resisted extraction. The external link opens the MCPEL landing page for the current version. Confirm change status before citing paragraph-level uniform rules.