There are certainly better experts on this subject than I, but I do know the answer is no, marines have conducted urban warfare exercises in real cities before.
If they do it in an area where there are going to be civilians around they give plenty of advance warning, and get permission of the local authorities, as they thought they had in this case.
“If they do it in an area where there are going to be civilians around they give plenty of advance warning”
How do you warn everyone possible about the harmless meaning of urban gunfire? It seems to me like an unnecessarily risky practice if a more controlled setting is available.
Marines Invade San Diego Texas, and are invited to come back next year.