MontyB
All-Blacks Supporter
The Franco-Prussian war was different from the other wars in the 19th century, but the Modus didn't change much until 1918. However, the Prussians were changing their thoughts about war, the major change occurred after the great war.
The Franco-Prussian war had more in common with WW1 45 years later than it did with the Crimean war 18 years earlier.
If you look at the current batch of wars I think there has been another change which began with the Armenia-Azerbaijan war.