Complex sentence: The story of wartime messenger pigeons such as Gustav were made into the 2005 animated film "Valiant", the same year that Gustav's Dickin Medal went on display at the D-Day Museum in Portsmouth, Hampshire.
Split into simpler sentences: The story of wartime messenger pigeons such as Gustav were made into the 2005 animated film "Valiant". In 2005, Gustav's Dickin Medal went on display at the D-Day Museum in Portsmouth, Hampshire.