Strong states rights is the answer to the question
Use of ground troops: Americanization used US ground troops to fight the war whereas Vietnamization used S.Vietnamese ground troops to fight the war.
Johnson moved the US from an aid and financial backer to a ground force with men in active duty on the front lines in addition to naval and air support. Nixon's policy removed the ground troops, leaving the S. Vietnamese to fight that on their own (with our aid and money) but continued our air strikes and naval support.
Innovations in farming techniques that led to great productivity.
1.- <em>Three Point Linkage</em>. Developed by Harry Ferguson, this invention raised or lowered the plough, depending on the depth farmers wanted to dig.
2.- <em>Genetical Modified Corps</em>. Scientist isolate genes with some desirable traits to improve the quality of the plant.
3.- <em>Fertiliser Deep Placement.</em> A new form of fertiliser that increased the Yields.
4.- <em>New Feeding Methods</em>. Blending different components of food to improve the quality of nutrition.
It was constantly attacked by foreign countries and this made it get weaker
Answer:
The end of the space race & the colapse of the soviet union
