The phrase "went to war" typically refers to a nation's decision to engage in armed conflict. There are several synonyms that can be used to describe this action. For instance, one could say that a country "entered into combat," "joined the fight," "took up arms," or "declared war." Other phrases include "mobilized for battle," "embarked on a military campaign," or "engaged in hostilities." Whatever the term used, the act of going to war is a serious one, with significant consequences for both the nation and its citizens. So, it is important to choose the appropriate phrase that reflects the gravity of the situation.