To the public they are unknown, officially they don't exist. The 1st special duties battalion is listed publicly as an "Elite frontline unit specializing in unforeseen and unprepared circumstances." Deliberately vague and it is widely regarded as one of Sumnia's 'ghost divisions' which are non-existent troop formations to hide the allocation of resources to spies and assassins. There are a couple of other units like this, such as the 13th Orbital Marines, and 17th Rangers. 17th rangers are actually spies, but the 1st special duties and 13th marine are the same unit. The supersoldier battalion. They are deployed in very specific circumstances, such as complete annihilation of enemy bases and large scale assaults. They rarely fight alongside other units, and no one above the rank of general is officially aware of their presence. There are of course rumors in the army of the ghost divisions and the battles they have supposedly taken part in. 17th rangers are famed for making an entire enemy battalion disappear without a single body, which coined the term 'ghost division'. The 13th marine are known for making daring orbital landings and boardings and are treated as heroes by their marine comrades. 1st special duties is treated with fear, as their image is one of assassins and murderers, and they wouldnt be far wrong. Depending on who the superhumans are meant to be dictates how they are treated, but they are usually separated from other troops anyway.
Apart from the obvious 'first rule of superhumans, dont talk about the superhumans' there is this particularly nasty rumor going around the army that if you speak to a 1st special duties soldier without being spoken to first you would lose your head. This is not true, but it is encouraged nevertheless.
Unsung heroes? They arent what we would call heroes. They are a nessesary evil in times of war, just like the nuclear bomb was in WWII All trace of the superhuman program was wiped away after the war, including all the soldiers that had thusfar served. No one is left to speak about the secrets.
This leads me quite nicely to the start of my book;
All the superhumans are dead. Right? So what do you do when you realise that there is one tearing up your metaphorical yard and instigating rebellion on multiple planets?