HELPING THE OTHERS REALIZE THE ADVANTAGES OF MUHARRAM

Did the occasions of Karbala truly occur, and when so why do we not mention this party as well as massacre in the Prophets grandson and his kids inside our Khutbas? Also did the Prophet not point out in a very Hadith that there will be twelve successors following me? has there not been in excess of twelve caliphs? I are studying about Shia Islam an