Anh ta phục vụ trong Thuỷ quân lục chiến khi nào?
In the summer of 1968, he served in Vietnam as a rifle platoon leader as a second lieutenant with Second Platoon, H Company, 2nd Battalion, 4th Marines, 3rd Marine Division.
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Robert Mueller phục vụ trong Thủy quân lục chiến khi nào?