沈(shen)光漢,早年(nian)(nian)(nian)(nian)曾(ceng)(ceng)入粵軍(jun)(jun)(jun)第(di)(di)(di)一(yi)(yi)(yi)(yi)師(shi)軍(jun)(jun)(jun)官補習訓(xun)練班受訓(xun)。民(min)國(guo)(guo)(guo)(guo)(guo)十(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)四年(nian)(nian)(nian)(nian)(1925)由(you)蔡廷(ting)(ting)鍇(kai)推薦,任(ren)粵軍(jun)(jun)(jun)第(di)(di)(di)一(yi)(yi)(yi)(yi)師(shi)第(di)(di)(di)一(yi)(yi)(yi)(yi)旅(lv)第(di)(di)(di)二(er)團(團長蔣光鼐)第(di)(di)(di)三營(營長黃(huang)質勝)上尉營副。民(min)國(guo)(guo)(guo)(guo)(guo)十(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)六(liu)年(nian)(nian)(nian)(nian)(1927)秋任(ren)第(di)(di)(di)十(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)師(shi)二(er)十(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)八團代理(li)團長。民(min)國(guo)(guo)(guo)(guo)(guo)十(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)八年(nian)(nian)(nian)(nian)(1929)年(nian)(nian)(nian)(nian)三月,任(ren)廣東編遣區獨(du)立第(di)(di)(di)二(er)旅(lv)(旅(lv)長蔡廷(ting)(ting)鍇(kai))上校副旅(lv)長兼第(di)(di)(di)一(yi)(yi)(yi)(yi)團團長(該團系原第(di)(di)(di)十(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)師(shi)二(er)十(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)八團改編)。是年(nian)(nian)(nian)(nian)秋,任(ren)第(di)(di)(di)六(liu)十(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)師(shi)(由(you)獨(du)二(er)旅(lv)擴建的)一(yi)(yi)(yi)(yi)一(yi)(yi)(yi)(yi)九旅(lv)少將旅(lv)長。民(min)國(guo)(guo)(guo)(guo)(guo)十(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)九年(nian)(nian)(nian)(nian)(1930)升十(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)九路軍(jun)(jun)(jun)六(liu)十(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)師(shi)副師(shi)長(師(shi)長蔡廷(ting)(ting)鍇(kai))。民(min)國(guo)(guo)(guo)(guo)(guo)二(er)十(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)年(nian)(nian)(nian)(nian)(1931)獲(huo)四等寶鼎勛(xun)(xun)章。是年(nian)(nian)(nian)(nian)六(liu)月升第(di)(di)(di)六(liu)十(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)師(shi)中將師(shi)長。民(min)國(guo)(guo)(guo)(guo)(guo)二(er)十(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)一(yi)(yi)(yi)(yi)年(nian)(nian)(nian)(nian)(1932)十(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)月,因“一(yi)(yi)(yi)(yi)·二(er)八”淞滬(hu)抗(kang)日有功,獲(huo)青天白日勛(xun)(xun)章。民(min)國(guo)(guo)(guo)(guo)(guo)二(er)十(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)二(er)年(nian)(nian)(nian)(nian)(1933)十(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)一(yi)(yi)(yi)(yi)月“閩變”爆發(fa),任(ren)福建人民(min)革命軍(jun)(jun)(jun)第(di)(di)(di)一(yi)(yi)(yi)(yi)方面軍(jun)(jun)(jun)第(di)(di)(di)一(yi)(yi)(yi)(yi)軍(jun)(jun)(jun)軍(jun)(jun)(jun)長(總司令蔡廷(ting)(ting)鍇(kai))。閩變失敗后回(hui)住香港(gang)。民(min)國(guo)(guo)(guo)(guo)(guo)二(er)十(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)六(liu)年(nian)(nian)(nian)(nian)(1937)抗(kang)戰軍(jun)(jun)(jun)興,出任(ren)軍(jun)(jun)(jun)事參(can)議員中將參(can)議,很少在軍(jun)(jun)(jun)界(jie)活動。三十(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)五年(nian)(nian)(nian)(nian)(1946)以后被選為第(di)(di)(di)一(yi)(yi)(yi)(yi)屆國(guo)(guo)(guo)(guo)(guo)民(min)大會代表(biao),也曾(ceng)(ceng)任(ren)私立德業(ye)小學(xue)校長。1972年(nian)(nian)(nian)(nian)11月29日病逝于香港(gang),終年(nian)(nian)(nian)(nian)八十(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)五歲。
1930年,沈光漢將軍(jun)任十九路軍(jun)六十師副(fu)師長(師長蔡(cai)廷鍇)。
1931年(nian),沈(shen)(shen)(shen)光(guang)漢率(lv)所部(bu)第六十(shi)師(shi)(shi)駐防蘇州、常州一(yi)帶。1931年(nian)1月(yue)28日(ri)(ri),日(ri)(ri)軍(jun)(jun)進攻(gong)上海,蔡廷鍇即令沈(shen)(shen)(shen)率(lv)部(bu)開赴(fu)上海抗戰。1月(yue)30日(ri)(ri),沈(shen)(shen)(shen)部(bu)到達上海南(nan)翔、真茹等地待(dai)命。2月(yue)1日(ri)(ri),接替駐在(zai)閘北、虹口及(ji)八字橋(qiao)(qiao)等處七十(shi)八師(shi)(shi)的防務。原七十(shi)八師(shi)(shi)翁照垣旅劃歸沈(shen)(shen)(shen)光(guang)漢指揮,沈(shen)(shen)(shen)師(shi)(shi)遂(sui)成為抗戰主力(li)。七十(shi)八、六十(shi)一(yi)師(shi)(shi)為總預備隊(dui)。2月(yue)3日(ri)(ri)始(shi),日(ri)(ri)軍(jun)(jun)相繼向(xiang)吳淞、閘北及(ji)江灣進犯,沈(shen)(shen)(shen)光(guang)漢率(lv)所部(bu)及(ji)配(pei)屬部(bu)隊(dui)與之浴血戰斗30多天,雖(sui)敵軍(jun)(jun)數倍于(yu)己,但沈(shen)(shen)(shen)師(shi)(shi)陣(zhen)地始(shi)終屹(yi)立不(bu)動。尤(you)其八字橋(qiao)(qiao)陣(zhen)地,地處要(yao)沖,敵軍(jun)(jun)在(zai)飛機、大炮、坦克的配(pei)合下(xia),輪番(fan)攻(gong)擊,沈(shen)(shen)(shen)率(lv)部(bu)堅決抵抗,僅2月(yue)7日(ri)(ri)一(yi)天,就殲日(ri)(ri)軍(jun)(jun)千余(yu)人,擊燒日(ri)(ri)軍(jun)(jun)前敵指揮雨田(tian)大佐。