New scientific knowledge help the building of the Panama canal because there was a decrease of workers getting sick of malaria and yellow fever. It was Colonel Gorgas, the Chief Medical Officer, who have read about discoveries linking mosquitoes and malaria. Due to these readings, he succeed in eradicating the cause of the disease therefore a decrease in people getting sick.
The main way in which southern blacks lost rights in the years after the Thirteenth, Fourteenth, and Fifteenth amendments was that "<span>c. Some white southerners used state legislation, segregation, and violence to limit the freedoms of blacks," in the years after the Civil War. </span>
The answer is: : The song used was called the <span>Yankee Doodle. Hope this helps! Good Luck! :)</span>
I tried to answer your question but it didnt let me so im going to try to comment i
He did not break terms of the Treaty of Versailles by making a treaty with Russia.
