A coniferous forest contains evergreen trees that bear cones. Elegant pines grow in this biome, along with spruce, fir, and tamarack. In much of the northern forest, the conifers mingle with deciduous trees, particularly aspen, birch, sugar maple, and basswood.
The United States entered the Vietnam war to prevent the spread of communism. China was already a communist country, and the United States believed that China would spread it to other Asian countries if it did not intervene. Continue Reading.
The United States still keeps troops in South Korea. War Breaks Out in Vietnam Much like its involvement in the Korean War, the involvement of the United Statesin Vietnam stemmed from its Cold War containment policy. After World War II, stop-ping the spread of communism was the principal goal of U.S. foreign policy.