Religion adn Conflicts

Johannes mentioned how foreign religions or just gods to Babylonia and other near by cities and empires did not spread as much as the Babylonian religion did. She said that the neighboring foreign communities were probably able to preserve their religion and way of practice but the Babylonian religion was the more dominant religion. What I have always wondered if there has ever been religious wars or any sort of conflict. Probably there was not as many between foreign religions if all were able to freely practice their own religion.

Another question is if there was any religious conflicts between cities with the same religion since different cities had different main gods. Like Marduk is for Babylon and Ishtar is for Uruk I find it hard that there was no conflict at all, at least I assume this because I have not found a statement by Johannes that has implied that. Or was everyone okay and understand that they believe in similar religions and everyone excepted each city’s preference. There is the mention of Nabonidus trying to make Sin the dominant god but it seemed to have been resolved over. Many kings started wars to take over more land and expand their empire and power but did kings make war over the gods? Could the have tried to make their god become the dominant in more cities. Or where there cities with rival gods and so conflict erupted? I find it hard to believe that there was hardly any religious conflict if there wasn’t in the Middle East.