 The introduction of the steam ship @-@ of @-@ the @-@ line led to a building competition between France and Britain . Eight sister ships to Napoléon were built in France over a period of ten years , but the United Kingdom soon managed to take the lead in production . <unk> , France built ten new wooden steam battleships and converted 28 from older ships of the line , while the United Kingdom built 18 and converted 41 . 
