It could be said that we were erring on the side of caution in the early game. That is, we had six pages of discussion and test games before we even settled Nidaros. Finally we founded our first city on the plains hill 2N of the settler's starting position.
The first turnsets went quietly, with exploring and basic research. The matter of the placement of the second city sparke lots of discussion. Finally we agreed on this site west of Nidaros.
At this time we were checking out Genghis' estates in the south and a most cunningly devious plan was starting to come into being. It consisted of kicking the Khan's behind while doing a GS-powered astronomy beeline. With the whole continent under our rule, we would take to the seas with our galleons bristling with berserkers and trebuchets, with a serious intention of kicking yet more backsides, leaving our old land defensless for Gandhi to capture.
Well, at that point it was still a long way to go and there were more immediate concerns. Like our next city. We decided to settle agressively towards Mongolia and so Haithabu was founded in the south.
We would capture Phyrgian later and so solidify our southern border.
Metal casting was researched pretty early, for forges and the Colossus. We built the latter in 5 AD in Birka, which was founded north between the clams and the iron. The Colossus was important for fueling our research in the classical and medieval times. We weren't big on cottages, because we were afraid that Gandhi would just pillage them upon invading, and so maturing them would be a waste of time.
Birka marked the end of our peaceful expansion. Here's a view of our lands from that time.
We got optics in 155 AD and headed out to the oceans to meet the world. Over the next centuries we met the other civs. (Brennus, Isabella, Washington, Mehmed and Hannibal, in that order.) Our early caravels really paid off in regards to trading. (Even though the same could have been achieved with a work boat.) We made good deals with everyone across the sea, except Washington, who we singled out as our target. He was disliked and fared badly in a war against Hannibal. Winning the circumnavigation prize was a nice bonus.
Our attention turned back home when Genghis declared war on us in 260 AD. At that point we weren't really ready for war. Fortunately his attack was quite pathetic and we soon gained the upper hand, capturing his cities in our back yard and marching towards Karakorum.
We made peace with him in 560 AD, our swords vs. his longbows just wasn't fun. Then he declared on us again in 770 AD. That war was still going strong by 1000 AD, though we were again dealing out more pain than we took.
The astronomy beeline was completed in 785 AD. From there it was to civil service for the vikings with two big axes. Our game was reaching a turning point.
Added into the spoiler thread.