As American involvement deepened in Vietnam-what obstacles did U. S. troops encounter that proved difficult to overcome?

britian is way too advanced for me my good luck

the answer is c.richard m. nixon

answer; i believe the two groups were irish immigrants and chinese immigrants;

the fact that could also be added to column b is that during world war ii, specifically between the years 1941 and 1945, japan expanded its territory towards the indonesian territory in what was known later as part of the "pacific war". in that time, japan could conquer the philipines, singapore,   borneo, central java, malang, cebu, sumatra and various other islands of the area, therefore expanding its territory for a brief period of time.