Suggestions for WikiTree Profiles: Error 896: Unknown parameter in template Help (Difficulty: Intermediate)

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Link Info Name Rel. Birth Death Gender Manager Marriage Status
Smith-162931
H 		start date =
{{World War II|branch=United States Army|start date=|units=|unit=|enddate=}}		 Richard Arthur Smith 13 Mar 1921 Wisconsin 20 Jun 2004 Waukegan, Lake County, Illinois Male Schwartz-2715
WikiTree ID Date Status Comment
Schwartz-2715 28.09.2023 11:13:32 Comment Don't know how to correct.
Schwartz-2715 04.10.2023 05:41:44 False suggestion I see nothing wrong with the template