Original: In that conflict, General Francisco Franco ordered Spanish Nationalists to use the weapon against Soviet T-26 tanks supporting the Spanish Republicans in a failed 1936 assault near Toledo, 30 km from Madrid.
Simplified: In that conflict, the Spanish Nationalists under the orders of General Francisco Franco had used the weapon against Soviet T-26 tanks. Those tanks helped the Spanish Republicans in a failed 1936 Soviet assault near Toledo, 30 km from Madrid.