Game started me with one province and a sabotage agent. Thinking I needed a diplomat agent to do things, I didn't get any trade going. By turn 5 I had taken a weak enemy town, should have made them a vassal because the neighbor faction declared war on me that turn. Turn 8, they invade and I pull all my units out of the town to get them on the battlefield.
I have some 1 unit of surviving swordsman, 1 matchlock unit, the rest are the awful beginner levy infantry and spears because it's all I can train. Battle comes, they have lots of line infantry which I severely underestimated. Also my force was led by a 1 star leader daimyo who outranked my 3 star heir. The enemy dodged both naval bombardments.
Finally, I charged them up on the hill they took, inspired the swordsman so they could take that strong center unit. Got 3 enemy units to route but they had reserves of yari spears. Then my general died along with any hope for the future. If only I had 6 line infantry of my own that early. There's nothing I could build to get units to match that faction's tech.
Tips for an 8 turn FotS newbie?