Genus Anoplolepis

I don't know what kind of ant this is, but I definitely managed to find a colony of these ants on a wild plant in my plantation, I don't know what this ant colony is doing, it looks like they are swarming the tree as if they are gathering food. However, if we look at it from a closer distance, we will be able to see small yellow insects attached to each branch of the tree, most likely they are aphids. But what is the problem between the ants and the aphids?
Are they fighting over territory?
At first everything looked peaceful, but as soon as I tried to approach this ant colony, they suddenly scattered as if they were watching and afraid of me, even I had a hard time photographing them. This ant is tea-colored, and that is one of my favorite colors, this ant is also not too dangerous to humans because they don't often bite, but they will crawl on our bodies.

Okay everyone, now I will share some pictures of this ant colony here.