On September 22, 1862, he released the preliminary Emancipation Proclamation, which served as a warning to the states in rebellion: if they did not rejoin the Union by January 1, 1863, their slaves would be freed. ... The war was no longer just about preserving the Union— it was also about freeing the slaves.
Steel was very much needed for many new industries, such as the railroads, toolmaking, construction. Also, many industries were needed to support the steel industry.
