Sentence:  As the prime minister insisted that he had "never told a lie" in his life, the Tory leader attacked him for ordering Scottish troops into battle with no warning that their <WSD>regiments</WSD> would be disbanded. 
Meaning of the word marked with <WSD> tags:  A unit of armed troops under the command of an officer, and consisting of several smaller units; now specifically, usually composed of two or more battalions. (from 16th c.)