So, after playing a long time as England I decided to try something new. "What about Genoa? It sounds cool." Then I started a campaign with the Genoese.
So after playing for like 25turns I was very poor, Genoa had been taken by Holy Roman Empire, a Venetian army was camping outside Milan and I had nothing but one stack composed mainly of militia, without any really good troops but some mercenaries, and Kievan Rus troops were ferociously attacking my eastern settlement in the Black Sea ( Caffa? ).
I started a new campaign. This time, I allied HRE ( I know they'll backstab me sooner or later ) and Kievan Rus, am going to ally Papal States.
But how I am supposed to stop the HRE invasion if they have larger and far better armies ( I have militia, they have armoured foot and mounted knights and men at arms ), and Venice, that also has better armies than I do ( although not to the same extent as HRE) , all of that with a tiny treasure?