Alma 24:20

And it came to pass that their brethren, the Lamanites, made preparations for war, and came up to the land of Nephi, for the purpose of destroying the king, and to place another in his stead, and also of destroying the people of Anti-Nephi-Lehi out of the land.

Their brothers, the Lamanites, got ready for war. They came up to the land of Nephi. They wanted to destroy the king and put someone else in his place. They also wanted to destroy the people of Anti-Nephi-Lehi.

Meanwhile, the unconverted Lamanites prepared for war and marched up to Nephi’s land. Their plan was to kill the king, put someone else on the throne, and wipe out all the Anti-Nephi-Lehies.