▁Republican ▁Ar med ▁Forces ▁extended ▁its ▁influence ▁among ▁Spanish ▁officers ▁and ▁began ▁displaying ▁open ▁host ility ▁towards ▁the ▁Spanish ▁Republic . ▁In ▁order ▁to ▁opp ose ▁and ▁neutral ize ▁this ▁movement , ▁Eugen io ▁Rodríguez ▁Sierra , ▁an ▁officer ▁of ▁the ▁Spanish ▁Republican ▁Navy ▁was ▁instrument al ▁in ▁the ▁foundation ▁of ▁the ▁Military ▁Ant if asc ist ▁Union ▁Un ión ▁Mil itar ▁Ant if asc ista ▁( U MA ). ▁The ▁Un ión ▁Mil itar ▁Ant if asc ista ▁was ▁later ▁merged ▁with ▁the ▁Republican ▁Military ▁Union , ▁Un ión ▁Mil itar ▁Republic ana ▁( UM R ), ▁another ▁c land est ine ▁group ▁of ▁similar ▁goals ▁that ▁had ▁been ▁founded ▁in ▁ 1 9 2 9 ▁within ▁the ▁Army , ▁in ▁order ▁to ▁create ▁the ▁Un ión ▁Mil itar ▁Republic ana ▁Ant if asc ista ▁( UM RA ). ▁This ▁organization ▁would ▁have ▁a ▁great ▁influence ▁among ▁the ▁ranks ▁that ▁were ▁lower ▁in ▁command ▁in ▁the ▁Spanish ▁Republican ▁Navy , ▁oppos ing ▁them ▁to ▁the ▁conserv ative ▁ide ology ▁of ▁their ▁top ▁officers . ▁ ▁The ▁Civil ▁War ▁( 1 9 3 6 – 1 9 3 9 ) ▁The ▁Spanish ▁coup ▁of ▁July ▁ 1 9 3 6 ▁de alt ▁a ▁severe ▁blow ▁to ▁the ▁structure ▁of ▁the ▁Spanish ▁Republican ▁Ar med ▁Forces , ▁which ▁ended ▁up ▁fragment ed ▁on ▁the ▁basis ▁of ▁joining ▁the ▁reb els ▁or ▁remaining ▁loyal ▁to ▁the ▁established ▁government . ▁The ▁failure ▁of ▁the ▁coup , ▁especially ▁in ▁the ▁main ▁cities , ▁Madrid , ▁Barcelona ,