Complex sentence: Hobbs would have fought in the First Battle of Porto and also partook in the Second Battle of Porto which he survived with Sharpe in the Battle at Talavera although he was not mentioned in Sharpe's Eagle.
Split into simpler sentences: Hobbs would have fought in the First Battle of Porto and also partook in the Second Battle of Porto which he survived. He would have been with Sharpe in the Battle at Talavera although he was not mentioned in Sharpe's Eagle.