Historical romance at war time, lad and lass from opposing sides of the war?

A Romeo and Juliet retelling set in a grander narrative of war, could be a national war or civil war. They could already be a couple, then war breaks out, they find themselves at the opposing sides; or, they meet during the war and fall in love, then they find themselves at the opposing sides. Either way, it turns into a cruel test of loyalty, value and love, in extreme cases, they could be accused of collusion with enemy, even treason, if they continue their relationship. They could be a royalist and a revolutionary during the American Revolution, a northerner and a southerner during the Civil War, a progressive and a German immigrant during WWI, a socialite and Nazi soldier during WWII, a patriot and a Russian immigrant during the Cold War, hell, it could be a Kamala voter and a Trump voter, you get the idea.