Think of famous people from the 1800s. How many names come to mind? Abraham Lincoln, John Wilkes Booth, Ulysses S Grant, Robert E Lee, George Custer, Theodore Roosevelt, William Sherman, George Pickett, Stonewall Jackson, Lewis and Clark. Others will be found in history books but likely not as well known.
Many from WWI were quickly forgotten when WWII eclipsed them. My father was in WWII but all the records of his service were lost in the fire at the National Personnel Records Center in 1973. The government only kept one set of records and all in the same building.
I've never worried about being remembered. I don't worry about things while I'm living. I'm certainly not going to worry about what happens after I die.