"Was Buddha really born in Nepal?" how can u prove it??

I am thinking of bringing the non-issue for nepalese and unknown for westerns "Buddha was Born in Nepal not in india" in my speech class. i am supposed to give ten minutes speech with scholar citation, the thing is that it is very hard to find 10 sources for this topic. Also if u can help to find scholar sources. Is there anybody who has ever done this topic (either write or spoken)?

I need to have (3)three concrete thesis points that clearly explain that Buddha was born in Nepal.

Or

u can suggest different topics that you guys have spoken in your speech class.

thank you for u r comments and helps.