The archaeologists and historians criticized the building of the Three Georges Dam because it flooded and destroyed a large number of important cultural and archaeological sites. The dam has caused a lot of ecological changes and approximately 1.3 million people had to move because of the creation of this dam.
Sources such as diaries though not very reliable can be used if there are a large amount of them showing the same date and event. Historical books written about the event especially those closer to the time would be able to help determine that the date is accurate as well.
In general, the native Indian languages in Latin America were able to survive. This was because the colonial governments were not forbidding the native languages and were not punishing the people for using them. Instead, the politics was, that the language of the colonists is a must-known language for everyday communication between the different people, but they can use their own languages in the communication between themselves and at home. This is why the countries in Latin America nowadays have multiple official languages, most of which are native Indian languages.
A sudden tropical storm disrupted an effort to move his army northward across the York River to Gloucester Poin.
Hope this helps