Ukraine has gone from accepting just about any old weapon to showing Western militaries how modern war is fought

Ukraine's allies now see it as a key partner that helps their own future security. Serhii Mykhalchuk/Global Images Ukraine via Getty Images Ukraine started its fight against Russia's full-scale invasion accepting any help it could get. Some of that equipment was decades old and pulled from storage. Now, allies are studying Ukraine's technology and battlefield tactics. Ukraine has gone from taking almost any military support its Western partners could spare to helping those countries prepare…