That would be the drills for US Civil War infantry, right? Have you read the book/ are an expert on the period?
Why did Hardee use term light infantry? 1861 you would have had (apparently)"light" infantry,mounted infantry and... what else I really don't know.
Did they still use the term grenadiers then?
Know little about the US Civil War, but know there were Zouave (spelling?) regiments. Were they some kind of ( French fusilier inspired???) "heavy" infantry?
I have read parts of Hardee's "Tactics" , as well as manuals from the American Revolution (flintlocks). I am not an expert but am doing some heavy reading on the Civil War, and appreciating the magnitude of the tragedy.
"Light infantry" refers to skirmishers as opposed the Line Infantry. Formations of skirmishers grew to as many as 600 men. Cavalry often fought as infantry (e.g. BG John Buford's 1st Cav Div at Gettysburg). Grenades were used in defense and assault of field fortifications, but there were no grenadiers as far as I know.
North and South had Zouaves, patterned after French formations, which led to some confusion on the battlefield.
Gen Lee had his men built extensive fortifications as opposed to confronting the enemy in the field. His men called him "The King of Spades."
Civil War formations were: company, regiment, brigade, division, corps and army.
Surprised to see you back Mr. Ewald.
"A bad penny always turns up."