21st Century Classical Greek -- time words

Book I section 18.1.

ἐπειδὴ δὲ οἵ τε Ἀθηναίων τύραννοι καὶ οἱ ἐκ τῆς ἄλλης Ἑλλάδος ἐπὶ πολὺ καὶ πρὶν τυραννευθείσης οἱ πλεῖστοι καὶ τελευταῖοι πλὴν τῶν ἐν Σικελίᾳ ὑπὸ Λακεδαιμονίων κατελύθησαν (ἡ γὰρ Λακεδαίμων μετὰ τὴν κτίσιν τῶν νῦν ἐνοικούντων αὐτὴν Δωριῶν ἐπὶ πλεῖστον ὧν ἴσμεν χρόνον στασιάσασα ὅμως ἐκ παλαιτάτου καὶ ηὐνομήθη καὶ αἰεὶ ἀτυράννευτος ἦν: ἔτη γάρ ἐστι μάλιστα τετρακόσια καὶ ὀλίγῳ πλείω ἐς τὴν τελευτὴν τοῦδε τοῦ πολέμου ἀφ᾽ οὗ Λακεδαιμόνιοι τῇ αὐτῇ πολιτείᾳ χρῶνται, καὶ δι᾽ αὐτὸ δυνάμενοι καὶ τὰ ἐν ταῖς ἄλλαις πόλεσι καθίστασαν), μετὰ δὲ τὴν τῶν τυράννων κατάλυσιν ἐκ τῆς Ἑλλάδος οὐ πολλοῖς ἔτεσιν ὕστερον καὶ ἡ ἐν Μαραθῶνι μάχη Μήδων πρὸς Ἀθηναίους ἐγένετο.

Learn epeidi, husteron, and idi which are all time expressions. Also learn etos, year.

https://en.wiktionary.org/wiki/%E1%BC%94%CF%84%CE%BF%CF%82

ὑπὸ Λακεδαιμονίων κατελύθησαν

is not an ergative structure but straight intransitive; the conjugated verb is in passive voice.

The grammar of the first subsection is confusing, isn’t it?

ἐπειδὴ δὲ οἵ τε Ἀθηναίων τύραννοι καὶ οἱ ἐκ τῆς ἄλλης Ἑλλάδος ἐπὶ πολὺ καὶ πρὶν τυραννευθείσης οἱ πλεῖστοι καὶ τελευταῖοι πλὴν τῶν ἐν Σικελίᾳ ὑπὸ Λακεδαιμονίων κατελύθησαν (ἡ γὰρ Λακεδαίμων μετὰ τὴν κτίσιν τῶν νῦν ἐνοικούντων αὐτὴν Δωριῶν ἐπὶ πλεῖστον ὧν ἴσμεν χρόνον στασιάσασα ὅμως ἐκ παλαιτάτου καὶ ηὐνομήθη καὶ αἰεὶ ἀτυράννευτος ἦν: ἔτη γάρ ἐστι μάλιστα τετρακόσια καὶ ὀλίγῳ πλείω ἐς τὴν τελευτὴν τοῦδε τοῦ πολέμου ἀφ᾽ οὗ Λακεδαιμόνιοι τῇ αὐτῇ πολιτείᾳ χρῶνται, καὶ δι᾽ αὐτὸ δυνάμενοι καὶ τὰ ἐν ταῖς ἄλλαις πόλεσι καθίστασαν), μετὰ δὲ τὴν τῶν τυράννων κατάλυσιν ἐκ τῆς Ἑλλάδος οὐ πολλοῖς ἔτεσιν ὕστερον καὶ ἡ ἐν Μαραθῶνι μάχη Μήδων πρὸς Ἀθηναίους ἐγένετο.

Athinaion modifies turannoi.

Kai through Hellados also modifies turannoi, the tyrants in the other Hellenes.

Epi polu kai prin turanneutheisis means for the most part even before taking over, meaning in Athens.

Oi pleistoi is most of the tyrants.

Kai teleutaioi plin tov en Sikelia is the last tyrants to rule, except the ones in Sicily (who stayed in power)

The next part through the end of the parenthetical phrase tells how the Lakedaimonians put down tyrants

ὑπὸ Λακεδαιμονίων κατελύθησαν (ἡ γὰρ Λακεδαίμων μετὰ τὴν κτίσιν τῶν νῦν ἐνοικούντων αὐτὴν Δωριῶν ἐπὶ πλεῖστον ὧν ἴσμεν χρόνον στασιάσασα ὅμως ἐκ παλαιτάτου καὶ ηὐνομήθη καὶ αἰεὶ ἀτυράννευτος ἦν: ἔτη γάρ ἐστι μάλιστα τετρακόσια καὶ ὀλίγῳ πλείω ἐς τὴν τελευτὴν τοῦδε τοῦ πολέμου ἀφ᾽ οὗ Λακεδαιμόνιοι τῇ αὐτῇ πολιτείᾳ χρῶνται, καὶ δι᾽ αὐτὸ δυνάμενοι καὶ τὰ ἐν ταῖς ἄλλαις πόλεσι καθίστασαν), μετὰ δὲ τὴν τῶν τυράννων κατάλυσιν ἐκ τῆς Ἑλλάδος οὐ πολλοῖς ἔτεσιν ὕστερον καὶ ἡ ἐν Μαραθῶνι μάχη Μήδων πρὸς Ἀθηναίους ἐγένετο.

Thucydides believed that until the time of the Hellenes (AKA Dorian invasion, AKA return of the Herakleides), Lakedaimon was mostly uninhabited. 21^st century digs into the Palace Culture turned up documents in Linear B that refer to the Lakedaimonians. However, Linear B records an Indo-European language already akin to Greek. Since we haven’t deciphered Linear A, the premier language of the Palace Culture, we don’t know if it documents residents of Lakedaimon.