Which of the following were strategies used by the Union during the Civil War? Select all that apply.
1. Blockading Confederate ports to prevent trade and supplies
2. Emancipating slaves to weaken the Confederate economy and labor force
3. Utilizing the Anaconda Plan to surround and squeeze the Confederacy
4. Recruiting and training African American soldiers to fight for the Union cause
5. Advancing through a series of coordinated military campaigns to capture key Confederate territory