I'm considering using a third-person viewpoint (a first for me!) and switching between two characters that are literally on different sides of a war. Now this is just my paranoia talking, but would it jar a reader too much to switch back and forth with them? How could I introduce the different characters and their cultures without making my prose seem a little bipolar? I'm more comfortable with first-person, but I wanted to try something new to help better my plot... so what do you think?