The noun wars is the plural form of the singular noun war.
The singular possessive form is war's.
The plural possessive form is wars'.
Examples:
Our city was in ruins by the war's end. (singular)
The wars' cost in lives in the twentieth century should never be repeated. (plural)
Wars is plural. The singular possessive of wars is war's. The plural possessive is wars'.
The singular possessive is army's.The plural possessive is armies'.
The plural form is wars. The plural possessive is wars'.
Veterans - plural does not have an apostrophe.Veteran's - singular possessive does have an apostrophe.Veterans' - plural possessive does have an apostrophe.
The singular possessive form is military's.
The singular possessive form for the noun army is army's.
Museum is singular. Museum's is singular possessive. Museums is plural. Museums' is plural possessive.
The singular possessive is biker's; the plural possessive is bikers'.
Niece's is a singular possessive noun. niece - singular nieces - plural niece's - singular possessive nieces' - plural possessive
The word sisters' is plural possessive. The singular is sister, singular possessive is sister's; the plural is sisters, the plural possessive is sisters'.
The singular possessive is army's.The plural possessive is armies'.
The singular possessive is avocado's; the plural possessive is avocados'.
The singular possessive of "ant" is "ant's" and the plural possessive is "ants'".
Women's is a plural possessive. The singular possessive is woman's
The singular possessive form is heart's; the plural possessive form is hearts'.
The plural form is wars. The plural possessive is wars'.
The singular possessive is author's. The plural possessive is authors'.
The singular possessive is author's. The plural possessive is authors'.