Bernd 12/07/2020 (Mon) 22:26:39 No.41398 del
In several units this struggle came to light during the coup, notably in:

'2nd Group of the 4th Howitzer Regiment: At dawn on the 1st, moved from Pouso Alegre to Belo Horizonte as part of the Caicó Detachment. A warrant officer and several sergeants refused to go, and the two batteries used corporals in their place. On the departure there was fear they’d be fired at from behind, which never happened. Those who refused, however, were married into the local population and pressured to change their minds by their conservative families. In Belo Horizonte the group was informed but sought to avoid their reintegration. It only happened in Paracatu, under orders from above, but the sergeants were met with insults written in the dust on the trucks.
5th Cavalry Regiment (Quaraí): 49 out of 54 sergeants, inspired by a captain, refused to move with the regiment and had to be replaced with corporals.
12th Combat Engineering Battalion (Alegrete): Sergeants stood behind their legalist commander in spite of his pro-coup officers.
19th Infantry Regiment: armed legalist sergeant holdout in a corner of the quarters.
3rd Cavalry Division: as seen, legalist sergeants in 3 out of 4 formations in Bagé, the division HQ, 12th Cavalry Regiment and 3rd Mechanized Recon Regiment, with an armed takeover in the HQ and resistance in the other two.

Can I draw a conclusion from this? This would be worth a paper but I’d have to draw on more sources, like the internal discipline inquiries, which have been made public, and try to quantify several kinds of reaction. Compared to those cases there are countless units which saw little to no resistance. But case 12 in particular means that even if the sergeants’ movement as a whole didn’t grasp the Army, there were small pockets of potential militancy.
It must also be considered that expressions of unrest in “peacetime” are different from expressions of legalism in the course of a coup, which is naturally more divisive. Perhaps many sergeants in the examples given were previously quiet and only now the situation demanded action.