Tengen Eiyuu Taisen

After receiving a mysterious invitation to ‘come play in Heaven’ Oda Nobunaga and his sister are transported to a mysterious new world where the mightiest warriors from history will meet to do battle! Here the pair will meet legendary figures such as Napoleon, Julius Caesar, Zhuge Liang and plenty of others, to see who will be crowned the greatest of all time!

(Source: Titan Manga)