That crop would be Tobacco due to the fact that John Rolfe brought tobacco seed from the West Indies (which was the main supplier to tobacco users in Britain.) to Jamestown.
<span> President Lincoln rescinded Fremont's emancipation proclamation, fearing it might push other Border States (slave states loyal to the Union) into the Confederate camp. Staff corruption, opposition from Missouri’s influential Blair family, and military defeats caused Lincoln to relieve Fremont of his command on November 2, 1861.</span>