Paper and printing. Also the compass was a development from the Tang Dynasty as well
Whast are u aasking any more details ]
Separation is the type of nationalist movements
Explanation:
Let's start with the explanation of the basic belief of nationalism which is nothing but people who belong to a single nationality or ancestry should come and live under the same government. There are three types of the nationalist movement and they are unification, separation and state-building. As the word unification defines it is nothing but merging the politically divided land but they are culturally same. Separation is defined as culturally distinct groups resist to be a part of a state. State-building is a culturally distinct group forming into a state.
The goal was to stop the spread of Communism.
(Look into Domino Theory.)
B. They let the local leaders become too powerful, they eventually got attacked from the east, west, and north. I hope this helps :)