Strong Tide is the 6th province (Stage 1 Province 6) of the Oceanic Future, accessible (along with Fresh Flow) after taking control of Dark Abyss to the northeast. Taking over Fresh Flow and Strong Tide unlocks Rough Expanse, Tideless Deep and Serene Waves.
If previous sectors acquired by negotiation:
It's good to see another friendly face. Grab a megaphone and let's go!
If at least one sector taken by force:
What's wrong, did it leave you speechless?
You're outnumbered. Go away.