Northern Taiwan and the Penghu Islands are…
1876 CE to 1887 CE
The French occupy Keelung on October 1, 1884, but are repulsed from Tamsui a few days later.
The French win some tactical victories but are unable to exploit them, and the Keelung Campaign ends in stalemate.
The Pescadores Campaign, beginning on March 31, 1885, is a French victory, but has no long-term consequences.
The French evacuate both Keelung and the Penghu archipelago after the end of the war.