Why did Grant attack Jackson first which turned out to be a brilliant move?

Grant attacked Jackson first during the Civil War because he recognized that defeating this key Confederate general could significantly weaken the enemy's overall command and morale. By targeting Jackson, who was known for his aggressive tactics and ability to rally troops, Grant aimed to disrupt the Confederate strategy and seize the initiative. This bold move ultimately paid off, as it not only diminished the Confederate forces but also allowed Union troops to gain a crucial advantage in subsequent battles. The decision showcased Grant's strategic foresight and willingness to take calculated risks.