The movement of Soviet troops into Afghanistan.
B. geographical boundaries created in earlier historical periods
Answer:
Bostonians had to search for and recover the discarded tea.
President Richard Nixon is the only president to resign from the office and was the 37th president of the United States, serving from 1969 to 1974. Vice president Gerald R. Ford of Michigan took the office as the new president to complete the remaining 2 1/2 years of Nixon's term.
I think rivers is one of them and maybe mountains
