I'll grab a new dwarf as well..
Name him Bob, and if possible, I'll have an axedwarf. However, retire him from military, as soon as you have some decent armor and a shield, enable the hunting job on him.
Until you have some decent armor, so he can survive his hunting jobs, Bob will be happy to assist with any construction projects that need doing (masonry and architecture jobs).
As for an idea how 80 dwarves came to be together..
What sprang to mind for me: Those 80 dwarves are (descendants of?) survivors of one of the last dwarven civilizations, captured by the Orks when their last mountainhome fell.
The Orks have been trying to find and free their demon Lord for ages.
Being very bad miners, they used the captured dwarves to mine deep into the mountains, trying to find the pit their demon Lord has been imprisoned in since the beginning of time.
One day however, chaos ensued, as another demon Lord appeared at the Orks' stronghold, and spread doom and destruction, in an attempt to subdue the Orks under his dominion.
Many Orks died in roaring flames, and many dwarves died too.
However, a somewhat less brave troop of dwarves, who had been mining when the demon appeared, managed to build a solid wall from dug out rocks, and walled themselves in, away from the onslaught.
From there, they dug their way to the other side of the mountain, and fled away from it as far as their legs would carry them. When they awoke the next morning, they found they had set up nights' camp right next to the remains of, what seemed to be, a dwarven caravan.
Under the moss-covered remains of a wagon they found tools, weapons, and even some armor.
Even greater was their joy, when they found some barrels of well-aged dwarven wine.
It must have been Armok's will that they were guided here.
A council was held, and it didn't take long for the dwarves to decide that they were destined to refound dwarven civilization. They journeyed on for some time, meeting some odd dwarves with different backstories on the way, and fate led them to an abandoned outpost in a frozen landscape...