to cheer you up for this period there are some very good made Polish films. Don't ask me for the original Polish titles... It is a three part series, two of them ware made in the 70ies and the last one some years ago.
War against against the Swedes
War against the Turks
The latest one "Fire and Sword" is fighting against the Cossacks with a lot of good fighting szenes. Polish troops with German mercenary artillery against the Cossacks and some Tatars. A very good movie!!