Explanation:
Red Guards, in Chinese history, groups of militant university and high school students formed into paramilitary units as part of the Cultural Revolution (1966–76). These young people often wore green jackets similar to the uniforms of the Chinese army at the time, with red armbands attached to one.
A country would want to get a larger military to overpower or to stand ground against other counties. "Problems" that this could cause to a nation is to be over militarized and not care about its citizens, problems to surrounding nations is that they would feel threatened by a larger military.
Answer: their use of roads
Explanation:
The 12th president was Zachary Taylor