Translation of "Mista'en" in Portuguese

Here first with missiles, from a temple's height / hurled by our comrades, we are crushed and slain, / and piteous is the slaughter, at the sight / of Argive helms for Argive foes mista'en.

Logo, porém, do alto do templo, verdadeira / chuva de dardos disparados pelos nossos / cai sobre nós, causando triste morticínio, / tudo devido às armas e penachos / gregos, que nos serviam de disfarce.