I'd just drop a few dozen mother of all bombs (MOABS) on them. If the explosions don't kill them the sound will by will blowing out their hearing. Then they wouldn't be able to hear a tank if it rolled up on top of them.
First, send in the jets with precision guided bombs to take out their power and fuel infastructure.
Second, MOAB them several times in various locations, especially around food producing infastrucuture (farms, ports, towns, etc)
Third, send in Tanks, Artillery, and Troops and go house to house with no mercy on life. Kill EVERYONE!! Take NO prisoners!
