There are many ambitious tasks in Chapter 2 of "Ice Age 2". Ensuring that there are 2,000 people in the settlement is one of them. What needs to be noted is that the place where 2,000 people are reached is not the Dauntless, but a normal place. For a stronghold, you must first research "Settlement Heating Technology".
How to achieve the requirement of 2,000 people in Ice Age 2 Chapter 2
After defeating the Dauntless, upgrade the settlement to maintain a population of 2,000. You need to build a settlement that produces unlimited resources and upgrade it. The area that can be planned is called a colony.
For settlements, please research "Settlement Heating Technology" first, and then upgrade other discovered settlements. That one only needs to provide materials and population to build, and then provide maintenance fees and stationed scouts, and you can have a steady stream of Provide you with supplies, the main city and the dreadnought are not included in this settlement
When things are there, people are there too.