沈光(guang)漢,早年(nian)曾入(ru)粵軍(jun)(jun)(jun)(jun)第(di)一(yi)(yi)師(shi)(shi)軍(jun)(jun)(jun)(jun)官補習訓(xun)(xun)練班受訓(xun)(xun)。民(min)(min)(min)國(guo)十(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)四年(nian)(1925)由蔡(cai)(cai)(cai)廷鍇(kai)(kai)(kai)推(tui)薦,任粵軍(jun)(jun)(jun)(jun)第(di)一(yi)(yi)師(shi)(shi)第(di)一(yi)(yi)旅(lv)第(di)二(er)(er)(er)團(tuan)(團(tuan)長(chang)(chang)(chang)(chang)蔣光(guang)鼐)第(di)三(san)營(營長(chang)(chang)(chang)(chang)黃質(zhi)勝)上尉(wei)營副。民(min)(min)(min)國(guo)十(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)六(liu)年(nian)(1927)秋任第(di)十(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)師(shi)(shi)二(er)(er)(er)十(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)八(ba)團(tuan)代理團(tuan)長(chang)(chang)(chang)(chang)。民(min)(min)(min)國(guo)十(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)八(ba)年(nian)(1929)年(nian)三(san)月(yue)(yue),任廣(guang)東編遣區獨立第(di)二(er)(er)(er)旅(lv)(旅(lv)長(chang)(chang)(chang)(chang)蔡(cai)(cai)(cai)廷鍇(kai)(kai)(kai))上校副旅(lv)長(chang)(chang)(chang)(chang)兼第(di)一(yi)(yi)團(tuan)團(tuan)長(chang)(chang)(chang)(chang)(該團(tuan)系原第(di)十(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)師(shi)(shi)二(er)(er)(er)十(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)八(ba)團(tuan)改編)。是年(nian)秋,任第(di)六(liu)十(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)師(shi)(shi)(由獨二(er)(er)(er)旅(lv)擴(kuo)建的(de))一(yi)(yi)一(yi)(yi)九(jiu)旅(lv)少(shao)將旅(lv)長(chang)(chang)(chang)(chang)。民(min)(min)(min)國(guo)十(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)九(jiu)年(nian)(1930)升十(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)九(jiu)路軍(jun)(jun)(jun)(jun)六(liu)十(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)師(shi)(shi)副師(shi)(shi)長(chang)(chang)(chang)(chang)(師(shi)(shi)長(chang)(chang)(chang)(chang)蔡(cai)(cai)(cai)廷鍇(kai)(kai)(kai))。民(min)(min)(min)國(guo)二(er)(er)(er)十(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)年(nian)(1931)獲(huo)四等(deng)寶鼎(ding)勛(xun)章(zhang)。是年(nian)六(liu)月(yue)(yue)升第(di)六(liu)十(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)師(shi)(shi)中(zhong)將師(shi)(shi)長(chang)(chang)(chang)(chang)。民(min)(min)(min)國(guo)二(er)(er)(er)十(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)一(yi)(yi)年(nian)(1932)十(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)月(yue)(yue),因“一(yi)(yi)·二(er)(er)(er)八(ba)”淞滬抗日有(you)功,獲(huo)青天白日勛(xun)章(zhang)。民(min)(min)(min)國(guo)二(er)(er)(er)十(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)二(er)(er)(er)年(nian)(1933)十(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)一(yi)(yi)月(yue)(yue)“閩變”爆(bao)發,任福建人民(min)(min)(min)革命軍(jun)(jun)(jun)(jun)第(di)一(yi)(yi)方面(mian)軍(jun)(jun)(jun)(jun)第(di)一(yi)(yi)軍(jun)(jun)(jun)(jun)軍(jun)(jun)(jun)(jun)長(chang)(chang)(chang)(chang)(總司(si)令蔡(cai)(cai)(cai)廷鍇(kai)(kai)(kai))。閩變失敗后(hou)回住香港。民(min)(min)(min)國(guo)二(er)(er)(er)十(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)六(liu)年(nian)(1937)抗戰(zhan)軍(jun)(jun)(jun)(jun)興(xing),出(chu)任軍(jun)(jun)(jun)(jun)事參(can)議員中(zhong)將參(can)議,很少(shao)在軍(jun)(jun)(jun)(jun)界活動。三(san)十(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)五(wu)年(nian)(1946)以(yi)后(hou)被選為第(di)一(yi)(yi)屆國(guo)民(min)(min)(min)大(da)會(hui)代表,也曾任私立德業(ye)小學校長(chang)(chang)(chang)(chang)。1972年(nian)11月(yue)(yue)29日病逝于香港,終年(nian)八(ba)十(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)五(wu)歲。
1930年,沈光漢(han)將軍任十(shi)九(jiu)路(lu)軍六(liu)十(shi)師副師長(師長蔡廷鍇)。
1931年,沈(shen)(shen)光漢率(lv)(lv)所部(bu)(bu)第六(liu)十(shi)(shi)師(shi)駐防蘇州(zhou)、常州(zhou)一帶。1931年1月(yue)(yue)28日(ri)(ri)(ri)(ri)(ri)(ri),日(ri)(ri)(ri)(ri)(ri)(ri)軍(jun)(jun)進攻上海,蔡(cai)廷鍇即(ji)令沈(shen)(shen)率(lv)(lv)部(bu)(bu)開赴上海抗戰(zhan)。1月(yue)(yue)30日(ri)(ri)(ri)(ri)(ri)(ri),沈(shen)(shen)部(bu)(bu)到(dao)達上海南翔、真(zhen)茹(ru)等(deng)地待命。2月(yue)(yue)1日(ri)(ri)(ri)(ri)(ri)(ri),接替駐在閘北、虹口及八字橋等(deng)處(chu)(chu)七(qi)十(shi)(shi)八師(shi)的防務。原七(qi)十(shi)(shi)八師(shi)翁照垣旅劃歸(gui)沈(shen)(shen)光漢指揮,沈(shen)(shen)師(shi)遂成(cheng)為抗戰(zhan)主(zhu)力。七(qi)十(shi)(shi)八、六(liu)十(shi)(shi)一師(shi)為總預備隊。2月(yue)(yue)3日(ri)(ri)(ri)(ri)(ri)(ri)始(shi),日(ri)(ri)(ri)(ri)(ri)(ri)軍(jun)(jun)相繼向吳淞、閘北及江(jiang)灣進犯,沈(shen)(shen)光漢率(lv)(lv)所部(bu)(bu)及配屬(shu)部(bu)(bu)隊與之浴血(xue)戰(zhan)斗(dou)30多天,雖(sui)敵(di)(di)軍(jun)(jun)數倍(bei)于己,但(dan)沈(shen)(shen)師(shi)陣地始(shi)終屹立不動(dong)。尤其八字橋陣地,地處(chu)(chu)要沖,敵(di)(di)軍(jun)(jun)在飛機(ji)、大炮、坦克的配合下(xia),輪番攻擊,沈(shen)(shen)率(lv)(lv)部(bu)(bu)堅決抵抗,僅(jin)2月(yue)(yue)7日(ri)(ri)(ri)(ri)(ri)(ri)一天,就殲日(ri)(ri)(ri)(ri)(ri)(ri)軍(jun)(jun)千余人,擊燒(shao)日(ri)(ri)(ri)(ri)(ri)(ri)軍(jun)(jun)前敵(di)(di)指揮雨田大佐(zuo)。