Summarize how the Vietnam War ended and what the government has done to attempt to keep events like the Vietnam war from repeating

Having rebuilt their forces and upgraded their logistics system, North Vietnamese forces triggered a major offensive in the Central Highlands in March 1975. On April 30, 1975, NVA tanks rolled through the gate of the Presidential Palace in Saigon, effectively ending the war.

Explanation: im not sure what the government has done to kepp the war from happening again sorry.

the answer here would be

the right answer is the third one: turnpikes went short distances to connect markets. turnpikes, also known as toll roads, were very important for trade and transportation (of people, goods and products) in the 19th century, coinciding with the expansion towards the west. they contributed significantly to the economic development of the united states.