Finland
In Finland, long-range patrols (kaukopartio) were especially notable in the Second World War. For example, Erillinen Pataljoona 4 (4th Detached Battalion), a command of four different long range patrol detachments; Detachment Paatsalo, Detachment Kuismanen, Detachment Vehniäinen and Detachment Marttina operated throughout the Finnish Campaign 1941-44. These units penetrated Soviet lines and conducted recon and destroy missions.
During the trench warfare period of the Continuation War, long-range patrols were often conducted by special Finnish sissi troops.
Former President of Finland, Mauno Koivisto, served in Lauri Törni's specially designed Jäger Company (called 'Detachment Törni') in the Finnish 1st Infantry Division. This unit conducted several difficult missions against Soviet strongholds and attacks. Lauri Törni became a US citizen and entered in the US Army, becoming a Special Forces soldier. He gave the US Army Special Forces important knowledge in long range patrolling and fighting. He was declared MIA during the Vietnam War in 1965, until his remains were found and were buried in Arlington on June 26, 2003.
Read more about this topic: Long Range Reconnaissance Patrol