Please capitalize where necessary: did you know,in the quest for world domination, the nazis built some of the biggest and deadliest pieces of military hardware and malevolent technology in history?
A: Did you know,in the quest for world domination, the Nazis built some of the biggest and deadliest pieces of military hardware and malevolent technology in history?

Please capitalize where necessary: the continental blockade was that all the european powers of france banned trade with the british.
A: The continental blockade was that all the European powers of France banned trade with the British.

Please capitalize where necessary: instructions: mouse to select options.
A: Instructions: Mouse to select options.

Please capitalize where necessary: here are the different stages to achieve an origami of watermelon:
A:
Here are the different stages to achieve an origami of watermelon: