bajirao a forgotten hero

Just recently watched Bajirao-Mastani directed by Sanjay Lila Bhansali. Really enjoyed watching the movie.
It was very proud to know that mother India had produced such a great warrior, who never lost a single war during his life-time. He fought around 40 wars in his life(he died at around 39 years of age) and won each of them. During his tenure maratha hindu samrajya covered upto half of India. We can safely assume that if he hadn't died of fever at such an early age he might've even conquered foreign sultanat (that of mughals). But sadly he died due to fever at such an early age.
   It lead me to thought that why during our studies of Indian histories we were never taught of such great Indian heroes who fought to free mother India from foreign clutches. All that we were taught was successive foreign rulers who ruled Delhi gulam vansh, lodhi vansh, mughals etc but never of such great warriors. We were never even taught of Maharana Pratap as much as we learned of Jalaluddin. This kind of history teaching never produce sense of pride in an individual.