Some of the historical events from 1970 to 1990 are:
Explanation:
The 1970s: Watergate Scandal (1972–74)
On August 9, 1974 -meeting likely impeacement for his role in covering up the gossip envelope the break-in at the DNC ( Democratic national committee)Western Association in Washington, D.C., in June 1972—Republican Ricard nixon grew the only U.S. president to retire.
The 1980s: PATCO Strike (1981)
U.S. Pres. Ronald Reagan’s triumph over the stroke by the Professional Air Traffic Controllers Organization (PATCO) in August 1981 performed a crucial purpose in the long-term weakening of the control of labour associations and supported set the tenor for his government.