From 1897 to 1914, von Krieglstein served as a war correspondent, covering total of 17 battles, revolutions and or expeditions. In 1897 he reported for a Vienna newspaper on the Greco-Turkish War (1897) in Crete. His advocacy for the Turkish led to his arrest by Greek forces, but he was soon released after diplomatic mediation. He then went to work briefly for the press office of the Foreign Ministry of the Ottoman Empire in Constantinople. In 1897/98 he covered the activities of the Venezuelan revolutionary (and future president) Cipriano Castro and the Spanish–American War in 1898. He subsequently covered the Boxer Rebellion in China (1901–1902), after which he published a book: "The Battles of the German Expeditionary Force in China" (1902). During the Russo-Japanese War of 1904–1905, he was embedded within the Imperial Japanese Army, but was captured by the Russians. At this time, he was a reporter for the "Berliner Lokal-Anzeiger" ("Berlin Local Advertiser").