Between 1969-1975, what key events happened in the vietnam war?

May 1961: President John F. Kennedy sends helicopters and 400 Green Berets to South Vietnam and authorizes secret operations against the Viet Cong.

November 1963: President Kennedy is assassinated in Dallas, Texas. Lyndon B. Johnson becomes president.  

February 1965: President Johnson orders the bombing of targets in North Vietnam in Operation Flaming Dart in retaliation for a Viet Cong raid at the U.S. base in the city of Pleiku and at a nearby helicopter base at Camp Holloway.

July 1965: President Johnson calls for 50,000 more ground troops to be sent to Vietnam, increasing the draft to 35,000 each month.

1966: U.S. troop numbers in Vietnam rise to 400,000. 1967: U.S. troop numbers stationed in Vietnam increase to 500,000.  

February 1967: U.S. aircraft bomb Haiphong Harbor and North Vietnamese airfields.

March 1968: President Johnson halts bombing in Vietnam north of the 20th parallel.

November 1968: Republican Richard M. Nixon wins the U.S. presidential elections on the campaign promises to restore “law and order” and to end the draft.

December 1972: President Nixon orders the launch of the most intense air offense of the war in Operation Linebacker.

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.