Over 1000 district people took an active part in guerrilla fights and many more of them both morally and materially supported the fighting kinsmen. During December 1944 to February 1945, following heavy fights the district was liberated by the famous Soviet Army. Over 2100 Soviet soldiers and officers lost their lives during the short period. Thankful people have honoured memory of the soviet victims and fallen heroes of the Slovak National Uprising by memorials founded at Lučenec, Poltár, Kokava nad Rimavicou, Cinobaňa, Fiľakovo, Radyovce, Budiná, Halič, Lovinobaňa, Divín, and many other villages.
The period 1945 – 1948 was also at the district of Lučenec qualified by heavy political fights for continuation of the national-democration to socialistic revolution. But only post the 1948 victory of the working class enjoyed the district its real, never until then experienced, economic and cultural growth outlined, designed and led by the Communist Party of Czechoslovakia. Thanks to an early international help coming from the Soviet Union and other socialist countries, as well as thanks to deeprooted class-consciousness of a significant volume of the population was the growth never stopped by counter-socialistic forces in 1968, and so is the Lučenec District free to quietly continue the socialistic construction.
Literally at all towns and villages of the district dozen of new schools, houses of culture, health service stations and shopping centers were built up, topped by thousands of luxurious new flats and family houses. The quality and extent of services performed by local economical units, by productive collective units, and small Popular Committees workshops improve from year to year. Network of roads and railtracks is completely rebuilt and each and any village of the district has regular connections provided either by train or by buses. Services for motorist are furnished by specialized workshops at Lučenec and Fiľakovo, respectively. There is lot of petrol stations.
Various branches of industry of the district are represented by Kovosmalt – national enterprise Fiľakovo, standing at the first place, but also by many other enterprises: Lute textile works Lučenec – Opatová, ZŤS Lučenec, glassworks at Poltár, Zlatno, Katarínska Huta, Málinec and Utekáč, automobile repairs are performed at SAO Lučenec,..