The 27-year-old Tottenham Hotspur attacker undertook his three week training on the south Korean island of Jeju with the 9th Brigade of the Marine Corps.
Now South Korean officials have revealed that Son finished top of the 157 trainees at the camp’s graduation ceremony on Friday.
The Korea Herald states that his activities included shooting and bayonet skills, chemical, biological and radiological training, individual battle skills and first aid training.
In the shooting exercise, the Spurs marksman, who had to cut his hair short while in camp, apparently hit 10 out of 10 shots on the target.
“He received the ‘Pilsung’ prize which is one of five types of awards for best performers,” a Marine Corps officer is quoted as saying in the Herald.
“All the courses were judged in a fair and strict manner, and his military training officers have said he went through the training faithfully.”
Until Mauricio Pochettino granted the player permission to play in the 2018 Asian Games at the start of last season, Son had been set to complete two years of national service back in South Korea, a move which would have required him to break his contract.
By winning that tournament, an U23s competition with overage players that clubs are not required to release players for, the South Korean star became exempt from that service back home.
Instead Son had to complete the basic training and 544 hours of community service over the next 34 months, which will be completed around his football career.
The Spurs star will now return to the UK next week and will have to isolate for 14 days on his arrival in keeping with government guidelines.
Son will certainly have been keeping his fitness up during his time with the Marines and if the Premier League gets there way could be back in training at Hotspur Way not long after his self isolation ends.