אָ֣ז יַכֶּֽה־מְ֠נַחֵם אֶת־תִּפְסַ֨ח וְאֶת־כָּל־אֲשֶׁר־בָּ֤הּ וְאֶת־גְּבוּלֶ֙יהָ֙ מִתִּרְצָ֔ה כִּ֛י לֹ֥א פָתַ֖ח וַיַּ֑ךְ אֵ֛ת כָּל־הֶהָ֥רוֹתֶ֖יהָ בִּקֵּֽעַ׃ (פ)
Then Menachem struck Tipshah, everything in it, and its boundaries until Tirtzah because they didn't capitulate, so he destroyed it and split its mountains.
Rashi on II Kings
Because it would not open. The governor of the city did not open the city for him, to accept him as king over them.
Ralbag on II Kings
"...and all the strongholds and towers in the mountains were ripped up."