 Sources do not reveal El Occidente 's movements over the next eight months . But in April 1918 , the Chicago Daily Tribune reported on an encounter El Occidente had with two German submarines that had occurred on 2 February . In a 20 @-@ minute running gun battle , Naval Armed Guardsmen aboard El Occidente exchanged fire with two U @-@ boats , one on the port and one on the starboard . The news item reported that El Occidente 's gunners had demolished the periscope of one of her attackers . 
