havoc noun

VERB + HAVOC cause, create, play, wreak

PREP. ~ among The new tax could wreak havoc among smaller companies. | ~ for High winds have been creating havoc for farmers. | ~ in The disease can cause havoc in commercial orchards. | ~ on The flood wrought havoc on the countryside. | ~ to The storm caused havoc to wildlife. | ~ with The fog played havoc with flight schedules.