A good question, and one for a historian to answer - not me! The example I picked shows bias, but as I stated earlier I'm unsure as to which article is closer to the truth.

Just for the record, though, the English article includes 9 citations, including a primary source (Wellington's notes), while the Spanish article mentions 4 history books (and 3 novels and a comic) yet doesn't specifically cite them in the text. Again, I suspect the English article is probably more accurate, but as use of citations is also a characteristic of fraudulent scientific papers this difference certainly isn't a completely dependable indicator.