What is another word for opened hostilities?
Pronunciation: [ˈə͡ʊpənd həstˈɪlɪtiz] (IPA) 
The term "opened hostilities" refers to the beginning of a conflict or war. There are several synonyms for this phrase, such as "initiated combat," "started the fighting," "began the war," "commenced hostilities," and "launched an attack." Other similar phrases include "ignited conflict," "set off hostilities," and "triggered a war." These synonyms are commonly used in news reports, historical accounts, and military documents. Regardless of the wording used, the concept of "opened hostilities" implies a significant and often violent escalation in a conflict that can have far-reaching consequences for those involved.
