Ukraine's ad hoc fortress in Donetsk

The 30-Mile Barrier Preventing Russia From Taking More of Ukraine | WSJ

How to get Russian troops to surrender in large numbers

Instead of using drones to kill them one or two at a time, drop leaflets and broadcast a message from a loudspeaker on the drone.

What matters is the method that gets the most Russian troops, alive or not, off the battlefield.  

During Desert Storm, Iraqi troops surrendered to drones by waving white flags when the heard the drones' engines. 

Iraqis Surrender Gulf War Operation Desert Storm 1991

It's unlikely Russian troops will retreat Highway of Death style, and Ukraine does not have enough combat aircraft to intercept a retreating convoy.

Highway of Death; Desert Storm/Gulf War

shoot and scoot

Most fire is suppressive = pin them down and hit them hard

RPO-A Shmel (Шмель)💥 in Action❗

choose your fighter

Heavily defend the main targets and ignore the loss of others.

Compare and contrast: drones vs artillery

Ukrainian Azov Drones Destroyed a Russian Convoy Full of Troops - Then They Did THIS...

Russia's Artillery Capabilities: On target! BM-30 Smerch 9K58, Tornado-G, TOS1-A, BM-27 Uragan

Ukraine Left Speechless: Putin Quietly Built the Largest Armored Force in Europe Has Seen Since 1945

Drones cannot replace tanks and artillery.  

Strengthening Ukraine's defenses with surplus Albanian bunkers

The 750,000 Bunkers of Albania

Ukraine is and must remain on the defensive. Clearing Russian trenches, booby traps, and obstacles is a waste of scarce manpower and other resources. The same is true of propaganda flag raisings. The only flag raising that matters in war is the last one. Borrow or build Albanian bunkers. If a small country like Albania can do it, so can Ukraine. Also, Albania is about a 1-day drive from Kyiv. 

Let the Russians try to weather a storm of steel like this:

Knob Creek Machine Gun Shoot - Final round 4K UHD (2 of 2 rounds, Oct 9 2021)

Or this:

Enemy at the Gates Soviet Charge Scene (High Quality)

Dropping leaflets and using sound trucks would work better for getting Russian troops to surrender. 

Offering young Ukrainian men who fled the chance to return and make fortifications would make the country much easier to defend. 

I should add that concrete bunkers (especially camouflaged ones) are a much better defense against artillery and drones than trenches, barbed wire, or sandbags. 

Russia uses a simple yet costly tactic - they send out a squad or platoon with a small amount of ammo while officers in the rear observe how far they get before they are fired upon by Ukrainian troops. Then they use that location info to fire artillery at those same Ukrainian troops. 

Remember that many if not most Ukrainian soldiers are in their 40s. Men that old often have a hard time keeping up with the physical demands of soldiering. 

Russia captures Pokrovsk & Myrnohrad almost surrounded

Russian claims control of Ukraine’s Pokrovsk, raises flag over city | #ajshorts

Ukraine claimed to have recaptured the city weeks ago.

Ukrainian troops raise flag from Pokrovsk City Hall amid fierce battle with Putin's troops

Reminds me of an old cartoon:

Looney Tunes | Bunker Hill Bunny

Then they charge each other's forts and replace the flags. 

A rear guard would allow most of the Ukrainian troops to escape. That would leave a stay behind force to fend for itself with a high probability of capture. All available air power to include drones should be

used to keep the escape route open. There is not use in recapturing Pokrovsk or any other city now held by Russia. 

Full Moon Taj Mahal

Never let astronomy get in the way art. Although: Night View