This is the best summary I could come up with:

The sheer number of drones operating in Ukraine, as well as battle-management systems that provide real-time imaging and locations, mean that troops and tanks out in the open have just minutes before they're targeted, a top Ukrainian military official says.

"Today, a column of tanks or a column of advancing troops can be discovered in three to five minutes and hit in another three minutes," Maj. Gen. Vadym Skibitsky, the deputy commander of Ukraine's HUR military-intelligence service, told The Wall Street Journal.

"The days of massed armored assaults, taking many kilometers of ground at a time, like we did in 2003 in Iraq — that stuff is gone because the drones have become so effective now," Bradley Crawford, a retired US Army sergeant who's an Iraq war veteran, told the newspaper.

Ukraine has been increasingly relying on cheap, first-person-view drones, or FPVs, to take out Russian military hardware.

While the exact number of drones deployed remains unclear, the Royal United Services Institute estimated earlier this year that Ukraine was losing about 10,000 drones a month, a sign of their widespread use.

Russia is meanwhile working to make a deadlier, more advanced version of Iran's Shahed-136 attack drone, The Washington Post reported based on leaked documents.

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