One of the results of foreign invasion was the increase in power of kings.
true or false.

This is true. Many kings would plan and carry out invasions to gain goods, land and other loot and to expand their rule because many of them worried that another power would get too strong and take over their kingdom, and every king wanted to avoid that because they had become very fond of being king.

An Amendment is a slight change to the US Constitution.
Hope this helped.