What was the north main war goal during the civil war?

North didnt want it, just stay one nation. south broke away in feer that Lincoln would ban slavery. also cuz the way the gov wuz ran

Wrong. The south didn't want anything persay. The civil war is often catagorized as being a war over slavery, and this is false. The north was fighting to keep the union in tact. Abraham Lincoln stated that "If (he) could save the Union without freeing any slaves I(he) would do it, and if (he) could save the Union by freeing all slaves, (he) would do it....What (he did) about slavery, and the coloured race, (he did) because (he believed) it helps to save the Union."

The south was fighting the was as a constitutional issue. They felt that the abolition of slavery and the compromises of 1850 and the Missourri Compromise impeded on their 10th amendment right to decide for themselves.