Symbol of slavery and inequality

Many people wrongly believe that the union fought to abolish slavery.However the union still allowed slavery in the border states during the War for southern independence.If the Union fought to free slaves then why didn't the Emancipation proclomation free any slaves? Why were slaves (in the NORTH and south not get freed until after the war between the states.Did you Know that THE FLAG OF THE UNITED STATES REPRESENTED A NATION THAT ALLOWED SLAVERY FOR ALMOST 200 YEARS? I believe that the Union flag represents Slavery and Tyranny.What do you think?