Advance
Improved Rams
The concept of outfitting warships with rams goes back thousands of years, but great advancements in metallurgy have been made since then, and we should take advantage of these to create sturdier rams.
Advance tree
The game files don’t say where this goes: it has no requires, so the game places it in the 
Discovery tree itself.
Modifiers
Galley Power+25%
Definitionin_game/common/advances/4_choices_mil.txt:164
166icon = global_trade_routes_advance
167for = mil