During the Russo-Swedish War of King Gustav III (1788–1790), a monument was erected in honor of the fallen soldiers of the Elfsborg Regiment. It stands in the churchyard next to Sulkava Church. The monument was erected in 1936 by the Royal Elfsborg Regiment.

The inscription on the stone reads:
“Here rest soldiers of the Elfsborg Regiment who, in the war of 1788–1790, gave their lives for their homeland. The monument was erected by the Royal Elfsborg Regiment in 1936.”

The Cross of the Soldiers of the Elfsborg Regiment
The memorial cross for the soldiers of the Elfsborg Regiment who fell during the wars of King Gustav III is located in the village of Halttula in the municipality of Sulkava. The honorary titleholder Kaarlo Hämäläinen, together with the villagers of Halttula, built the burial mound in 1934. The Sulkava Lions Club later erected a copper cross on top of the mound. The unveiling ceremony was held on June 19, 1966.

The plaque on the memorial cross bears the following inscription:
“BURIAL GROUND OF THE SOLDIERS OF THE ELFSBORG REGIMENT WHO FELL DURING THE WARS OF KING GUSTAV III, 1788–1790. THE BURIAL SITE WAS DISCOVERED AND THE MONUMENT ESTABLISHED IN 1934 BY HONORARY TITLEHOLDER KAARLO HÄMÄLÄINEN TOGETHER WITH THE VILLAGERS OF HALTTULA / THE CROSS WAS ERECTED BY THE LIONS CLUB OF SULKAVA IN 1966.”