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<< Excluding generals and such...
Lauri Törni / Larry Thorne. First a finnish war-hero, then an american war-hero. If you don't know about him, look him up on Google or something. >>
Cool beans Nemesis. Thanks!
Edit: Man he was a baddass! >>
Yep, he sure was

! They modeled John Waynes character in "Green Berets" after him

.
EDIT: For the rest of you. Here is a brief description of Lauri Törni's / Larry Thorne's military-career:
Then there was Larry Thorne, one of Special Forces' more illustrious soldiers. He entered the Finnish Army in 1938. About a year later, he began a six-year period of continuous combat against the Soviets during World War II After various assignments with frontline infantry units, he volunteered for commando activities behind the Soviet lines. Lieutenant Thorne's most daring exploits began in 1942 as he conducted numerous deep penetration missions. On one, he personally led a small group of men behind Soviet lines, ambushing and destroying a Soviet convoy, killing over 300 of the enemy, and returning without a single casualty.
In June 1944, Thorne's unit was employed in the frontline role as the last reserve available. They conducted a counter-attack against the spearhead of an attempted enemy breakthrough operation. This action occurred only a few hours after his unit had returned from a mission behind Soviet lines. The commander of the particular sector described CPT Thorne's boldness during the attack, "My plan was to provide CPT Thorne with some artillery and mortar support which probably would have delayed the start of his counter-attack about an hour. However, CPT Thorne's plan was to attack immediately, before the Soviets had a chance to dig in. CPT Thorne counter-attacked in daylight through dense forest surprising the Soviets and resulting not only in destruction of a Soviet battalion, but also in saving the desperate situation."
CPT Thorne repeatedly exposed himself to extreme hazards; his leadership and heroism made him a national hero in Finland and earned him the Mannerheim Cross, Finland's highest military award, (equivalent to our Medal of Honor) in July 1944.
Following Finland's second defeat to the Russians, Torni was imprisoned by the
communists as a war criminal. He escaped prison three times and made his way to
the United States where he enlisted in the U.S. Army as a private.
Throughout the late 1950's, the budding U.S. Army Special Forces had been
building a controversial force to conduct unconventional warefare. These
unconventional warfare warriors had to be able to master critical military
skills needed to train and lead guerrilla warriors, to be inserted anywhere in
the world by any means of transportaion, to survive the most hostile
environment, and to take care of themselves and others under the pressures of
harsh combat conditions and isolation. At the same time, these individuals had
to be independent thinkers, able to grasp opportunities and innovate with the
materials at hand. In order to control and lead irregular fighters, they had to
understand people, languages, and foreign cultures. Most important, the Special
Forces warriors had to posses the intelligence, knowledge, tact, and acumen to
successfully transform ordinary civilians into an effective military threat to
a strong and cunning occupation army.
In addition to recruiting rugged individuals possessing these attributes from
regular army formations, the Special Forces attracted a proven lot of hardy,
versatile volunteers from Finland and other European countries through the
Lodge Act, Public Law 957 of the 81st Congress, sponsored by Henry Cabot Lodge,
Jr. Regardless of his background, each SF volunteer underwent strenuous
physical conditioning, including paratrooper training, and was extensively
tested to determine his best skills and abilities. He then received
comprehensive instruction in his specialty area.
In 1962, as a CPT he led his Special Forces Detachment onto the highest mountain in Iran to recover the bodies of an American Army air crew lost in a plane crash, and secure the classified material they transported. After unsuccessful attempts by others, his detachment's success was largely attributed to CPT Thorne's superb leadership.
Next, he went to Vietnam, he and his 7th Special Forces A-734
established the camp at Tinh Bien in April 1964 near the Delta's Seven
Mountains area, which bushwacked so many Viet Cong that it becamse a serious
thorn to the VC lifeline into Cambodia.
In a second tour of Vietnam, attached to Headquarters Company, MACV, Special
Detachment 5891, the Vietnamese Air Force CH34 helicopter on which Thorne was a
passenger crashed about 25 miles southwest of Da Nang. When rescue workers went
to the site, they recovered the remains of the Vietnamese crew, but found no
sign of Larry Thorne. He had simply disappeared.
Thorne's photo is maintained in a pre-capture photo group shown to defectors
for POW/MIA identifications purposes, yet Thorne was classified killed in
action the day after the crash. His remains were never found. Men who served
with him believe that Larry is still alive. They gather to toast his health
every year. No one, they say, is better equipped to survive than Larry Thorne.
In Finland, Lauri Torni is a national hero. In the United Sates, Larry Thorne
is forgotten by all but a few. His family believes he is still alive, even
considering he was 70 years old this year (1989). Lauri Torni hated the
threat of communism so much that he was willing to join any army to fight it.
Collected from various websites

. Not mentioned in that text is the time between The Winter War and The Continuation War, when he served in SS-division "Viking".