τοῦτο
From LSJ
μοῦνοι Ἑλλήνων δὴ μουνομαχήσαντες τῷ Πέρσῃ → alone of all Greeks we met the Persian singlehandedly, alone of all Greeks having fought singlehanded with the Persians
French (Bailly abrégé)
neutre de οὗτος.
English (Autenrieth)
demonstrative pronoun, this, (he), sometimes however to be translated that, as when it anticipates a following relative, Od. 6.201 f. Sometimes deictic and local, ‘here’ like ὅδε, Il. 10.82, 3, Il. 11.612. The article, required with οὗτος in prose, occurs in Homer once, τοῦτον τὸν ἄναλτον, Od. 18.114.
English (Strong)
neuter singular nominative or accusative case of οὗτος; that thing: here (-unto), it, partly, self(-same), so, that (intent), the same, there(-fore, -unto), this, thus, where(-fore).