The correct answer to this open question is the following.
The Union Army moved to stop the advanced on their capital.
We are referring to the Civil War years (April 1861-April 1865), in a moment when General Robert E. Lee, leader of the Confederate Army advanced over strategical Union's positions and tried to move through the Potomac River to capture Washington D.C., the capital city of the Union. The battle was a bloody one and both armies lost many men. In the end, the Union's Army of the Potomac impeded the Confederates to move on and frustrated its intentions to invade Washington.
He wanted peace and didn’t mind war to help get what he wanted which was for the south to start treating people of color with respect.
European rulers encouraged rivalries between settlers for goods and land which continued the tensions from the "B<span>. Protestant Reformation" since this had already been very divisive. </span>