Vandals tore down the Union Flag from a memorial commemorating Second World War soldiers in Pocklington.
Darran Walker came across the damage on Sunday (July 24) at 12.30pm.
The flag was cut down from the flag pole next to the memorial in the gardens off Grape Lane and Scaife Garth.
Mr Walker posted on a Pocklington Facebook group: "Upon investigation this morning by the Town Clerk it would seem that sadly my suspicions regarding the damaged Union Flag at the memorial were correct and that the flag was deliberately cut down in an act of vandalism with the perpetrators leaving it strewn across the floor..
"Please keep your eyes and ears open so that these disgusting individuals can be brought to justice."
Mr Walker was visiting the graves of the eight men who died when a plane, Halifax LW7769, crashed on New Street on July 24 1942. He then travelled to New Street before stopping at the memorial on his way home to York.
"I noticed the flag on the floor and picked it up draping it across the flower stand," added Mr Walker
The flag is now flying again and residents have posted on Facebook to thank the quick action of the town clerk Gordon Scaife who has reattached it.
Smashed bottles and glasses were also found nearby on George Street.
The incidents of vandalism have been logged with the police.