A M142 HIMARS launches a rocket in Donetsk Oblast, Ukraine, on May 18, 2023.Serhii Mykhalchuk/Global Images Ukraine via Getty Images The West has been sending Ukraine weapons and armed vehicles since the start of the war. Insider spoke to three experts who picked some of the most useful weapons in Ukraine's possession. These include Storm Shadow missiles and high mobility artillery rocket systems (HIMARS). For months, Ukraine pleaded with allies to get advanced weapons and armored vehicles that would make a big difference on the battlefield.