0 armed fighting between two or more countries or groups, or a particular example of this -- （国家或群体之间的）战争
nuclear war 核战争
If this country goes to (= starts to fight in a) war we will have to face the fact that many people will die. 如果这个国家参战，我们将不得不面对很多人都要送命的现实。
Britain and France declared war on Germany in 1939 as a result of the invasion of Poland. 因为德国入侵波兰，所以英国和法国于1939年对德宣战。
War broke out between the two countries after a border dispute. 边界纠纷导致两国之间爆发了战争。
They've been at war for the last five years. 过去5年他们一直在交战。
He died in the First World War/the Vietnam war. 他在第一次世界大战／越南战争中丧生。
The past few months have witnessed a price war between leading supermarkets. 最近几个月几家主要的超市之间爆发了一场价格战。
The president vowed to wage war on/against terrorism. 总统发誓要打击恐怖主义。
the war on drugs 打击毒品的战斗
The prime minister is to meet his European counterparts to discuss the war against drugs.
There is likely to be civil war if the region tries to secede from the south.
The number of casualties was appallingly high in both wars.
