Why did the us need to build up the navy in World War 1?

The United States needed to build up its navy during World War I to protect its maritime interests and ensure safe passage for troops and supplies across the Atlantic. As the war intensified and Germany's unrestricted submarine warfare threatened neutral shipping, a stronger navy was crucial for deterring attacks and maintaining trade routes. Additionally, a robust naval presence was essential for supporting Allied forces and asserting the U.S. as a key player on the global stage. Ultimately, naval expansion was vital for safeguarding national security and contributing effectively to the war effort.