From the start of Ukraine's 2014/15 crop year on 1 July until 27 August, the country has exported a hefty volume of grains. However, the new southeastern front opened by the rebels in and around the Sea of Azov could pose a more serious threat to those exports.News that Russian army units including infantry, tanks, and missile launchers have crossed the border into southeastern Ukraine and are attacking that nation's army positions along the way has further riled an already tense situation. This time, apparently, the Russians made no effort to hide their national identity. One report has them penetrating as far as 30 miles into Ukraine. Whether this action should be called an invasion as Ukrainian officials refer to it, or labeled an incurs...