+The designation **53d** typically refers to the fifty-third in a [Numerical Sequence](/wiki/Numerical_Sequence). It is often found within military titles, such as a [Regiment](/wiki/Regiment) or division, signifying a specific unit.
+## See also
+- [Military Unit](/wiki/Military_Unit)
+- [Army](/wiki/Army)
+- [Numbered Units](/wiki/Numbered_Units)
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