Why did the United States strive to maintain in European conflicts?

It was their neutrality. They were still in the process of building a country. Setting up laws and meeting the needs of the people were their primary concerns. As much as possible, they avoided conflict as much as they could.

The United States strived to maintain in European conflicts because they wanted for Europe to remain slightly weaker in a way which caused them to be able to expand themselves faster and more easily; compared to Europe. With the US economy booming, this was a main reason why they wanted to maintain European conflicts.