The OD in OD Green stands for Olive Drab. OD Green has been a part of military uniforms (and equipment) since before the Korean War. Learn up.

Olive Green Obligatto: OD Green, OG 107, OG 105, and Others
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The OD in OD Green stands for Olive Drab. OD Green has been a part of military uniforms (and equipment) since before the Korean War. Learn up.
MAS Grey takes its name from the Maritime Assault Suit (MAS Suit, or Maritime Assault Suit System). And it’s actually MAS Gray.
The Woodland camo pattern, also called M81 camo, proved so effective over 2 dozen countries adopted their own variation.
When it comes to military camouflage, the tigerstripe pattern has evolved over the years even though it was never actually an “official” military camo.