It’s generally called a garrison cap in the U.S. Army; you may also see side cap or overseas cap used for the same style. For the khaki/tan summer version, it’s often described as the khaki garrison cap or summer garrison cap.

Common names

  • Garrison cap : the standard Army term.
  • Side cap : a common alternate name.
  • Overseas cap : another historical name used for the same type of cap.

For khaki tan

The tan or khaki version was typically the lighter summer cap worn with summer service uniforms. In practice, if someone says “that khaki tan Army garrison cap,” they usually mean the khaki garrison cap.

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TermWhat it means
Garrison capOfficial Army-style name for the foldable side cap
Side capCommon alternate name
Overseas capHistorical alternate name
Khaki garrison capTan/light summer version