engage in hostilities

See: attack
References in periodicals archive ?
President Benigno Aquino III said on Thursday before asking if his detractors wanted him to engage in hostilities with China.
Engage in hostilities? he said in a mix of English and Filipino.
Well, it must be said that the United States did not at any time engage in hostilities with the Blackfeet in Kansas and Nebraska because the Blackfeet lived then, and do now, several hundred miles to the northwest in Montana and Alberta.