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To determine the nucleotide sequence in DNA, scientists now use
Wartime Presidents
Leaders who served as the head of a country during periods of conflict, charged with making critical decisions about national security, military strategy, and domestic wartime measures.
Abraham Lincoln
The 16th President of the United States, who led the country through its Civil War and played a key role in the abolition of slavery.
Jefferson Davis
The President of the Confederate States of America during the American Civil War (1861-1865), known for his leadership of the Confederacy in its attempt to establish independence from the United States.
George McClellan
A Union general during the American Civil War known for his cautious tactics and failed 1864 presidential bid against Abraham Lincoln.
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