C849 War for the Throne
The crisis of succession to the throne of the Spain in 1868 actually dates back to 1700, which was 168 years ago, when Charles II succeeded to the throne.
On November 1, 1700, King of Spain, Charles II, died. According to the relationship between relatives, it could be inherited by either the Habsburg or the Bourbon dynasty.
But he was also Emperor of France and Louis XIV's brother-in-law