What is the title of the first The Legend of Korra comic trilogy?

The first The Legend of Korra comic trilogy is titled Turf Wars.

Written by series co-creator Michael Dante DiMartino and illustrated by Irene Koh, Turf Wars continues the story immediately after the animated finale. Korra and Asami travel into the Spirit World, return to Republic City, and confront political and spiritual tensions surrounding the new spirit portal.

The trilogy was published by Dark Horse Comics in three parts: Part One on July 26, 2017; Part Two on January 17, 2018; and Part Three on August 22, 2018. A collected library edition followed in March 2019. The story also gives much more space to Korra and Asami's romantic relationship, including their first kiss.

A common mix-up is Ruins of the Empire, another three-part Korra comic trilogy. It is the sequel to Turf Wars and deals with the aftermath of Kuvira's surrender in the Earth Kingdom, so it was not the first trilogy.