The kingdom went into decline from the mid-16th century CE when the Portuguese, put off by the interference of Kongo's regulations on trade, moved their interests further south to the region of Ndongo. The latter kingdom had already defeated a Kongo army in 1556 CE.
Answer:
The German invasion of Poland. France and Britain told Hitler they would go to war with Germany if he invades Poland, so Hitler promptly invaded Poland.
Explanation:
Don’t take my word but I think it is b
<span>In Old Renaissance Europe, he was known for being the original inventor of algebra, though it's known that his work is based on older Indian or Greek sources.</span>