Judging from these accounts, vinegar seems to have been a condiment for use on meat..
Charles A. Stevens (a.k.a. Charley of Nimrod), a correspondent with the Fox Lake Gazette & brother of the famed Captain George H. Stevens of the Citizens Guard, Company “A” 2d Wisconsin Volunteer Infantry Regiment, writes on June 11th,1861 about the rations issued to the Citizens Guard while at Camp Randall in Madison, Wisconsin. Charley of Nimrod’s article appeared in the June13th, 1861 edition of the Fox Lake Gazette:
The boys are now furnished with butter at supper time, and fresh veal occasionally for dinner. The latter article, however, I do not believe will prove as good for them as the regular “beef and vinegar”.
On July 10, 1861, Charles C. Dow of the “Portage City Guards”, Company G, 2d Wisconsin Volunteer Infantry Regiment wrote to his friend James from Arlington Heights, Virginia:
Our rations are not of the most palatable kind, but rather of the substantial and consists of the following articles: pork, fresh beef, rice, coffee, beans, hard and soft bread, and vinegar. We receive beef, rice, and soft bread every alternate day. (The Second Wisconsin Infantry 136)
Charles A. Stevens once again details the rations of the Civil War soldier while at Camp Randall on September 6th, 1861. This time he is an enlisted soldier with the 1st Regiment of the United States Sharpshooters while training in Madison, Wisconsin. Charley of Nimrod’s article appeared in the September 12th, 1861 edition of the Fox Lake Gazette:
I find things here considerably improved since the time when the Citizens Guard first came into quarters at this place last spring. The barracks and mess room are now waterproof while tents are freely supplied whenever needed. As for the victuals, it is enough for me to say that they are in a “sound and healthy condition” and of great variety, such as beef and potatoes, bread and butter, coffee and water, beans, soups and stews, with a goodly sprinkling of pepper and salt, vinegar and “lasses”and occasionally fruit, such as melons & c.
Charles D. Waldo, a soldier in Company "D" 12th Wisconsin Volunteer Infantry Regiment, the Union Guards (a.k.a. the West Bend Hard Heads) writes about the rations he procures on January 26th, 1862 from Weston, Missouri. Charles article appeared in the February 8th, 1862 edition of the West Bend Post stating:
I seldom drill with them, as I have been chosen commissary sergeant of the company, and my time is too much taken up in attending to the duties of said office, to attend to much else. To give you some idea of what our company consumes, daily, I will give you a list of what I draw from the Quartermaster; 116 1bs flour, or 87 lbs. hard bread; 109 lbs. beef, or 65 lbs. bacon; 7 quarts of beans, or 9 lbs. rice; or in lieu thereof, 9 lbs. hominy; 9 lbs. coffee, or 1 1/2 lbs. tea; 14 lbs. sugar; 3 quarts of vinegar, and 2 quarts of salt.
Warren B. Pearson, of the 64th New York Volunteer Infantry Regiment, writes from his camp near Falmouth, VA on May 30th 1863:
Our bill of fare consists of a daily allowance of 1 lb. of bread 3/4-lb. pork or beef 2oz. sugar and what salt, vinegar and coffee we choose to use, also an occasional allowance of potatoes, sirup , and beans. We have a chance sometimes to buy some things at the brigade commesary department by getting an order from our officers. I have some dried apple, and some potatoes on hand now. Dried apple is 7¢ per lb, potatoes 50¢ per bushel. Sutler stores are dear, I buy but very little. Butter is 50¢ lb, cheese 40¢ lb, eggs 50¢ doz, apples 5¢ each, and other things in proportion.
George P. Risdon, a soldier in Company “F”, 20th Regiment Veteran Reserve Corps writes to his sister about not having vinegar to soak his salt pork. George Risdon is writing from Camp Hoffman-Point Lookout Maryland, June 28th, 1864. Because of the unique description of Civil War rations by Mr. Risdon to his sister, I will cite more than just the portion of his letter, which refers to vinegar.
Dina make a strawberry short cake and eat a piece of it for me and think while you are eating it of from a good table with a white clothe upon it and earthen dishes to eat of from: of setting outside of your tent and eating a piece of Salt horse on a tin plate in your lap and a tin cup full of coffee setting on the ground by your side and a case knife in your hand and using your fingers for forks and when you get that piece eat whish you had some more of the same but can't get it because you have had you ration. Think of that and you might call it tough but then again let me call your mind to the front. While you are eating your strawberry short cake think of the soldier at the front, poor soldier, you would say. After marching all day through the hot sun when he stops for the knight drops his blanket and gun and starts off for a rail if he can get one if not he picks up such sticks as he can find and starts a fire, gets some water in his canteen and makes him a cop of coffee then pours in some cold water to sittle it and then takes his hard tack from his haversack and a piece of Salt pork raw without any vinegar to put on it and eats his supper without any plate or knife at all. Think of that and then think how long the war has lasted and how much longer it is to last, how it was brought on in the first place; how many lives have been lost and how much suffering has been caused then get up, shake your selfe and Houle.
Alfred Wade recollects in his personal journal his rations at Libby Prison in Richmond Virginia. Wade was the Adjutant for the 73rd Indiana Volunteer Infantry Regiment. Confederate forces near Rome, Georgia captured him on May 3rd, 1863. This part of his account is from his journal dated July 4th, 1863:
... I may as well put our rations down here for the benefit of history. It consists of Bread ½ loaf (enough for two meals if we had other provisions plenty) Fresh beef ¼ lb. rice or beans ¼ as much as our man would eat salt and vinegar in very small quantities. This is all and is about 1/3 of the U.S. Govt. ration.