Determine if the sentence is true based on the text below:
The Royal Corps of Halberdiers fought several battles in the "Sword of Honour" trilogy.

The Royal Corps of Halberdiers is a fictional British regiment from Evelyn Waugh's "Sword of Honour" trilogy. In the novel, the regiment is described as being composed of four battalions: The 1st (Regular Infantry) 2nd (Territorial Army), 3rd (Commandos), and 4th (Militia). The Corps is derived from Waugh's own experiences in the Royal Marines throughout World War II.
It's impossible to say