A C D I think might be wrong tho
Answer:
It was the first major offensive and a decisive victory for the Allies in the Pacific theater. With Japanese troops stationed in this section of the Solomon Islands, U.S. marines launched a surprise attack in August 1942 and took control of an air base under construction.
Explanation:
The union had several advantages over the Confederacy, such as having more men, factories, railroad tracks, and more telegraph lines.