Answer:
Yes, it was a successful expedition
Explanation:
It was a successful and adventurous expedition because they were the first Americans to see the Pacific Ocean and to explore and map a route and trail to the Pacific Ocean. Being the first Americans to see the Pacific Ocean indecates this was a successful mission because it made Americans view Lewis and Clark as a hero. Being the first to map and route to the Pacific Ocean made new opportunities to anyone which lead to the Western Expansion. In conclusion, I think Lewis and Clark's expedition was a success.