An untrained militia's job is to shoot small arms fire at the tank, causing the crew to button up' (retreat inside of the tank).
With no one outside the tank, it becomes really hard to see things like NLAW or Javalin (USA version) troops. Maybe hiding on the 5th floor of the building 1.5km away.
You can train anyone to shoot towards a tank. They don't need to aim very well for the crew to be forced into the tank either.
Every additional person shooting at the tank is another location the tank crew needs to check for anti-tank infantry. So even an untrained rifleman who misses 100% of their shots is effective.
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It's strategies like this that force US soldiers to march with tanks. But the Russians apparently are incompetent at combined arms combat.
Soldiers outside a tank have better vision / eyesight, and can better radio the threats to the tank. The tank crew then prioritizes the shots better.
The tank crew at best have crappy cameras (albeit night vision enhanced but still, it's not very wide scope of vision)
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In any case, the Ukrainian military has many many trained soldiers. What they are missing is equipment. The militia / untrained are only there for support / force multiplying. No one expects the militia to march quickly, move into positions or operate sophisticated weapons.
But standing somewhere somewhat safely while making loud bang bang noises (even if they miss) is still really useful.
Infantry marching unprotected would be slaughtered by even semi-accurate small arms fire, especially from prepared positions. That's why there are armoured transport vehicles, and why the Russians developed an anti-personnel "tank" based on experiences in Chechnya, for close quarters fighting ( BMPT "Terminator") with machine guns, grenades and similar. They seem to be fully absent from the battlefield though.
I'm no military expert. But my understanding of military tactics is that an IFV (ie: M2 Bradley) is expected to have its squad of ~6-soldiers dismount ahead of time. The 6-soldiers maneuver / flank as needed, while the IFV's 30mm cannon + rocket launchers + light armor can be used to fight some positions.
So the full team is M1-Abrams (Tank with big 120mm gun + very thick armor, requiring specialized weapons to kill), M2-Bradley (IFV with 30mm gun + rocket launchers, with very light-armor) carrying a squad of 6 infantry.
The infantry could fight from inside the M2-Bradley, or outside the Bradley (mounted combat or dismounted combat), depending on the circumstances. The M2-Bradley's armor is very thin and made out of aluminum. I don't think anyone expects the M2-Bradley to actually take much fire.
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The M2-Bradley means that infantry can "march" with the tank at full speeds (M1 and M2 are designed to have similar top-speeds and maneuverability). But in a contested area, the squad-of-6 will dismount and run around (scouting, running cover-to-cover), and support the M1 and M2 as appropriate (Ex: looking for mines, calling out enemy bazooka / missile troops, etc. etc.).
Mounted-combat (ie: the squad-of-6 shooting out of the M2's portholes and relying upon the M2's armor as cover) is if the group is trying to get somewhere, either retreating... or advancing... to some other position.
In any case, anti-tank weapons designed for thick uranium-steel alloy armor would absolutely destroy an M2's aluminum armor. No one actually expects the M2 to seriously survive any serious firefight except only against the lightest of light firearms.
Cost of Camry: $25,395 [0]
Cost of T-72: $2,000,000 [1]
0. https://www.toyota.com/camry/2022/1. https://www.quora.com/What-is-the-current-price-of-a-T-72-ta...
The best way to eliminate a tank to cut off supplies to it, so it's better to destroy trucks.
Tanks with active protection are even better. You hit less than 10% with nlaw. Newest Javelin is a bit better.
That's why light infantry focus on trucks.
A tank will need approximately 300 gallons every eight hours; this will vary depending on mission, terrain, and weather. A single tank takes 10 minutes to refuel. Refueling and rearming of a tank platoon--four tanks--is approximately 30 minutes under ideal conditions.
https://www.globalsecurity.org/military/systems/ground/m1-sp...
See also laager: https://military-history.fandom.com/wiki/Laager
Thus: the farmers stealing tanks meme.
https://turbotax.intuit.com/tax-tips/general/what-to-know-ab...
So, the cost of the anti tank weapon isn’t that far off from the cost of a high-end Camry (XSE V6 $35,820).