Complex sentence: The post- 1808 Jäger battalions never carried flags and the Grenzers used the usual system, except that after 1807, all battalions appear to have carried one Ordinarfahne.
Split into simpler sentences: The post- 1808 Jäger battalions never carried flags. The Grenzers used the usual system, except that after 1807, all battalions appear to have carried one Ordinarfahne.