Assertion: platoon's lieutenant | /r/HasProperty | depend on the time period
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text: The commanding officer (a captain), and the one to three lieutenants, serving as platoon commanders (not designated as platoon "leaders" until 1943) and the executive officer (again depending on the time period, but not officially authorized until 1898) would direct the fighting, leading from the front in the attack and on the flanks in the defense.