这是真正的志愿军，没有得到美国政府支持的美国志愿军：The Lincoln Battalion was formed by a group of volunteers from the United States who served in the Spanish Civil War fighting for Spanish Republican forces against the Nazi-supported forces
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of General Francisco Franco and his Nationalist faction. Of the approximately 3,015 volunteers from the US, 681 were killed in action or died of wounds or sickness.