Nevertheless , after a few years Sharaf al - Dawla invaded .
Nevertheless , after a few years Sharaf al - Dawla occupied Khuzestan and Basra , causing the two princes to flee to Fakhr al - Dawla 's territory .
Nevertheless , after a few years Sharaf al - Dawla invaded and occupied Khuzestan and Basra , causing the two princes to flee to Fakhr al - Dawla 's territory .