וּבְאַרְבַּע֩ עֶשְׂרֵ֨ה שָׁנָ֜ה בָּ֣א כְדָרְלָעֹ֗מֶר וְהַמְּלָכִים֙ אֲשֶׁ֣ר אִתּ֔וֹ וַיַּכּ֤וּ אֶת־רְפָאִים֙ בְּעַשְׁתְּרֹ֣ת קַרְנַ֔יִם וְאֶת־הַזּוּזִ֖ים בְּהָ֑ם וְאֵת֙ הָֽאֵימִ֔ים בְּשָׁוֵ֖ה קִרְיָתָֽיִם׃
Und im vierzehnten Jahre kam Kedarlaomer und die Könige, die mit ihm hielten, schlugen die Rephaiter in Aschtheroth Karnajim und die Susiter in Ham und die Emiter in Schawe Kirjathajim
Rashi on Genesis
ובארבע עשרה שנה AND IN THE FOURTEENTH YEAR of their rebellion
Sforno on Genesis
והמלכים אשר אתו, the ones who had been signatories to the compromise deal 12 years previously, amongst whom had also been Amrafel.
Radak on Genesis
ובארבעה עשר .. את רפאים בעשתרות קרנים, they defeated the giants who lived at that place. The place עשתרות קרנים was so named seeing it was situated between two mountains, so that the word קרנים, “horns,” describes the way in which these mountains protruded from the earth’s surface. Our sages in Sukkah 2 already mentioned that all the places mentioned in these verses are not far from Sodom and Gomorrah. Perhaps the inhabitants had supported the insubordination of Sodom and satellites and that is why they were attacked.