Great Pollen Wars

The Great Pollen War is a war fought between sentient trees that grow in the Green Maw. One one side are those would would call themselves natives of the maw. On the other are trees who's seeds were blown into the maw before it was called the maw.

Because it is a war between trees, it is fought on a timescale that is beyond the comprehension of most sentient life. Military action, such as it is in a war between trees, might be non-existent for a centuries at a time.

The sentient trees recruit the Forest Halflings for their war. However, due to the strange nature of the war, the halflings do not know the full extent of the war, rather (for the most part, your mileage may vary), seeing actions they take for the trees as in service of the forest.