Titans of industry
I'm way out in front in the tech race right now, hitting the Industrial Era when a good portion of the map is still Medieval. I'm heading straight for Rifling next, so I can begin building the Swedish unique Caroleans that will form the backbone of my grand army. I'll pick up Banking and Economics on the way. You know, since I wasn't rich enough already.
1704 A.D.: The first professional Swedish musket regiment is raised in Sigtuna. The timing is fortuitous, as later that year, Denmark unexpectedly declares preemptive war on Sweden. The Celts and Greeks immediately agree to come to Sweden's aid against the warmongering Danes. The Swedish Lord-Governors had assumed the invasion of Austria would put them in conflict with Denmark, but they never expected their Norse cousins to strike first. Skirmishes near the border signal the beginning of the Great Continental War.
Looks like I lost the initiative in this conflict. Denmark's army is primitive compared to mine, but it includes the Danish unique Berserker units. Since Denmark is my most-played Civ, I am very familiar with how badly they can wreck things. Fortunately, this is a land war, and one of the berserkers' strengths is their ability to execute coastal raids. It is with a heavy heart that I send my forces to spill the blood of my longest-standing ally.
1708 A.D.: Lightning strikes by the Danish berserkers force the Swedish border regiments to fall back toward Sigtuna. The Danes press on, but are decimated by gunfire trying to cross the River of Storms. Though they're aided by swift, agile longboats, the melee troops are unprepared to face modern firearms.