Won a decisive series of victories as the Union of Utrecht in 1648. After I took Antwerpen, the Spanish evacuated all their forts in Brabant, so I was able to snatch them up. Austria renewed the war with me, but since they're far away and busy with the Turks, they didn't do anything about it. I was able to capture two of their Brabantine forts, and learned the hard way that their towers have muskets and their gatehouses have boiling oil. After upgrading my pikemen a bit, I then packed a powerful army of musketeers and pikemen onto ships, sailed to rebel-held Nijmegen, landed the army, and besieged the city. It was a star fort with indestructible walls and cannon towers, plus a full stack of troops. Not easy to take, so I infiltrated it with a spy.
Luckily, the spy was able to open the gates from the inside. During the battle, I cut down a quarter of the defenders on the ramparts with prolonged and heavy musketry, then stormed the gates with hundreds of pikemen. Long story short, it was a massacre that ended with concentrated musketry on their packed pikemen and militia in the square followed by a push of pikes. Though I started with 940 men against their 1,381, I took Nijmegen with 214 deaths and wiped out their entire garrison.
I'd post screenshots, but they're TGA files and I don't know how to upload them.