What position other than president does Lincoln claim that gives him power to issue the Emancipation Proclamation?

In the Emancipation Proclamation, President Abraham Lincoln asserts that his authority to issue the order stems from his position as Commander-in-Chief of the Armed Forces. He argues that as a wartime measure, it is within his powers to take actions that would weaken the Confederacy and preserve the Union, including the emancipation of enslaved individuals in rebelling states. This strategic decision was aimed at undermining the Confederate war effort while also aligning the Union's moral stance with the fight for freedom.