Some of the quest cycle and in events it is necessary to solve encounters
Don't do the recurring quests that ask for you to ,
"complete a province",
"gain 4 relics" (unless from other than sectors)
"solve 4 encounters"
"fight and win in 3 encounters"
Keep doing those quests and you will advance to "far " on the map
Then you wont have sectors and provinces for the events
All is not lost you can recover from this
One thing to remember Elvenar is meant to be a marathon not a sprint
If you want to fight to conquer provinces I would suggest that you slow down a bit on conquering provinces
Build and upgrade military buildings such as barracks ,armories and build the AWs you can that help with fighting or making troops
Or you could use your other resources and negotiate the sectors you cant win
Take a look in your research tree and see what the # of provinces required to open the chest over the next advanced scout tech
If you have already exceeded that # than you should stop conquering provinces for a while
Also they add a resource to the negotiating costs(orc heads) I think that is on ring #11 or around 222 provinces
You can only produce those once you reach the orc and goblin chapter of research
The good news is that once you are able to produce orcs there is no such thing as over scouting
All you have to worry about after that is reaching 457 provinces thats when you stop earning expansions
When that happens you either just keep scouting and conquering or stop (no benefit to stopping at this point)