Match each strategy to the side that most effectively used the strategy.(2 points)

Here’s the matching of each strategy to the side that most effectively used it:

1. **Utilized the railroad infrastructure to deliver supplies** - **Union Strategy**
2. **Implemented the Anaconda Plan** - **Union Strategy**
3. **Applied economic pressure** - **Union Strategy**
4. **Implemented a strategy of attrition** - **Confederate Strategy**

The Union focused on leveraging its superior industrial capabilities and infrastructure, while the Confederacy aimed to wear down the Union's resolve through attrition.