What mattel toy was introduced in 1968 to address the complaint that they had no line of toys for boys to balance their line of Barbie dolls for girls?

In 1968, Mattel introduced the action figure G.I. Joe to address the demand for a boys' toy line to complement their Barbie dolls. G.I. Joe was marketed as a "doll for boys," featuring a variety of military-themed outfits and accessories, which appealed to young boys' interests at the time. This move helped Mattel diversify its product offerings and capture a broader audience in the toy market.