Nekubuda kweHondo Yenyika I muna August 1914, Krueger akapiwa basa rokuva mucherechedzi muuto reGermany asi akamanikidzwa kuriramba nemhaka yezvaaifanira kuita nemhuri yake. Panzvimbo pezvo, akaiswa mu10th Infantry yePennsylvania Army National Guard. Chirongwa ichi chakatangwa musi wa 23 Chikumi 1916 uye chakashanda pamuganhu weMexico kwemwedzi mishanu sechikamu cheMexico Punitive Expedition.
pasi paMajor General John J. Pershing, kunyange zvazvo pasina zvikamu zveNational Guard zvakarwa nemauto eMexico. Chikwata chacho chakabviswa muna October 1916.