"Putin is looking for any chink in our armor," Kremlin critic Bill Browder told Newsweek.
Many of the mercenary fighters will have prior knowledge of the terrain and Ukrainian tactics around Bakhmut, the British Defense Ministry said on Friday.
Russian air defenses reportedly took down the fighter jet close to the frontlines in the contested Zaporizhzhia region of Ukraine.
Russia said shortly after the outbreak of all-out war in Ukraine that the risks of nuclear conflict were "considerable."
Russia's military has lost 6,375 artillery systems since the beginning of all-out war in Ukraine in February last year, Kyiv's military said on Thursday.
"World War III is getting closer," former Russian President Dmitry Medvedev said in mid-July.
The Kremlin leader "has narrowed the funnel of information that reaches him," according to a new report from the RAND Corporation.
Washington is "steeped in the Cold War mentality," North Korea's leader, Kim Jong-un, told North Korean officials on Thursday.
"With these rounds, we aren't going to win this war," the unidentified Russian soldier says in the clip.
About 42,500 ethnic Armenians from Nagorno-Karabakh have crossed into Armenia, Yerevan said on Wednesday.
Kherson is one of four mainland Ukrainian regions Russia said it annexed at the end of September 2022.
Both Russia and Ukraine have used decoys to waste the other's resources since February 2022.
The U.S.-donated M1 Abrams are "preparing to reinforce our brigades," the Ukrainian leader, Volodymyr Zelensky, said on Monday.
Ukraine's special forces said on Wednesday that 34 Russian personnel were killed in Friday's missile strikes on the Black Sea Fleet base.
U.S.-provided ATACMS would boost Ukraine's ability to fire deep behind the front lines into Russian-held territory.
The southern Ukrainian city of Odesa has been frequently targeted by Russian missile strikes.
U.S. cluster rockets like the M39 "are far and away the best additional weapon for this counteroffensive," said former Ukrainian military adviser, Dan Rice.
"Russia-Iran cooperation is reaching new highs," Russian Defense Minister Sergei Shoigu said on Wednesday.
Russia has lost a total of 6,137 artillery systems since the beginning of all-out war in Ukraine last February, Ukraine's military said on Thursday.
The Finnish-made satellite had "a very important role" in Ukraine's recent attack on Russian vessels in Sevastopol, Kyiv's military intelligence agency said.
"It's quite obvious that this war is going to last a long time," Turkey's leader, Recep Tayyip Erdo?an, said on Monday.
The ceasefire in Nagorno-Karabakh on Wednesday will mean the "complete cessation of hostilities," Moscow said.
The battle tank will "add another formidable armored capability" to Ukraine's counteroffensive, U.S. Defense Secretary, Lloyd Austin, said on Tuesday.
Russia's S-400 is broadly comparable to the U.S. Patriot system operating in Ukraine.
Ukraine is using cluster bombs "quite effectively," the White House said in July shortly after the U.S. sent dual-purpose improved conventional munitions.
The new air-launched cruise missiles will be fired from Russia's Tu-160 supersonic bomber, Moscow has said.
The new Russian BAS-80 drone, modelled on the U.S. Switchblade 300, is "already operation" in Ukraine, according to a Russian media report.
The U.S. military issued an appeal to the public on Sunday for "any information that may help our recovery teams locate the F-35."