生平

早年多舛

東晉晉穆帝|穆帝永和十一年（355年）

楊安祖父東晉前仇池天水公楊初被前任仇池君主楊毅最小的弟弟楊宋奴派人殺害，因此楊安之父楊國便率領左右侍衛誅殺楊宋奴等亂臣賊子，隨後繼承仇池君主的位置，成為第五任仇池公。而後東晉權臣征西大將軍桓溫便上表東晉朝廷，任命楊國為東晉鎮北將軍、秦州刺史、平羌校尉，並任命其子楊安為振威將軍、武都太守。

東晉晉穆帝|穆帝永和十二年（356年）

楊安的堂叔祖楊俊殺害其父楊國並自立為仇池君主，楊安為求自保便投奔前秦而去。

初顯鋒芒

東晉晉哀帝|哀帝(東晉)|興寧三年（365年）

這一年，匈奴右賢王曹轂、左賢王劉衛辰一起舉兵反叛前秦，二人率領部眾兩萬人進攻杏城(今陝西省黃陵縣西南)以南的各郡縣，隨後率軍在馬蘭山駐紮。烏延等各部也一同舉兵反叛前秦，並且與劉衛辰、曹轂有所聯繫。於是前秦天王苻堅便率領朝廷內外的精銳部對前往討伐這些反叛之徒，並命當時作為前將軍的楊安與鎮軍將軍毛盛等擔任先鋒都督。曹轂遂派遣其弟曹活率軍在同官川迎戰，兩軍隨後相遇大戰，楊安大敗曹活，斬殺曹活及斬首其部眾四千餘級，曹轂因此大為恐懼，隨後便舉部眾投降前秦。

東晉晉廢帝|廢帝(東晉)|太和元年（366年）

當年七月，前秦天王苻堅派遣前將軍楊安與輔國將軍王猛、揚武將軍姚萇等人率領兩萬軍隊進攻東晉荊州北部諸郡，隨後攻打南鄉郡。

八月，眾將一同在新野擊敗荊州刺史桓豁，隨後在掠走安陽民眾萬餘戶後回歸。

西陲戰事

東晉晉廢帝|廢帝(東晉)|太和二年（367年）

四月，前涼末代君主西平公張天錫率領步騎三萬人攻打前一年叛秦的李儼統治的大夏、武始二郡，並且成功攻陷二郡。張天錫的部將掌據（一作常據）在葵谷擊敗李儼的軍隊，隨後張天錫將部隊駐紮在左南。李儼感到十分恐懼，一路退守到枹罕，接著派他哥哥的兒子李純前去向前秦謝罪，並且請求發兵救援。苻堅便命前將軍楊安和建威將軍王撫率領騎兵兩萬人，與王猛會合後前去救援李儼。

王猛派南安太守邵羌追擊斂岐，讓建威將軍王撫守衛侯和，隴西太守姜衡守衛白石，隨後王猛便與前將軍楊安前往救援枹罕的李儼軍。張天錫派前涼前將軍楊遹在枹罕以東迎戰王猛二人，王猛率軍大敗楊遹，俘獲斬首一萬七千多人，接著與張天錫在枹罕城下相對持。邵羌在白馬擒獲斂岐，把他送往前秦都城長安（今陝西省西安市）。王猛隨後給張天錫寫信，說他接受苻堅的詔令前來救援李儼，沒想到卻意外和前涼交戰，如此相持下去，恐怕對前秦和前涼兩國都不利，各自撤軍才是良策。張天錫很認同王猛的話，於是在和屬下公布後率軍返回。

征討叛亂

十月，當時鎮守蒲阪（今山西永濟縣蒲州鎮）的晉公苻柳、鎮守上邽（今甘肅天水市）的趙公苻雙、鎮守陝城（今河南陝縣）的魏公苻廋及鎮守安定（今甘肅涇川北）的燕公苻武聯結一同據城叛變，苻堅送去書信勸四人投降，則一切官爵如故，不予追究，但四人皆不從。

東晉晉廢帝|廢帝(東晉)|太和三年（368年）

正月，苻堅派兵前往平叛，分別是後將軍楊成世攻打上邽；左將軍毛嵩攻打安定；輔國將軍王猛、建節將軍鄧羌攻打蒲阪；前將軍楊安、廣武將軍張蚝攻打陝城，苻堅命令攻打蒲阪、陝城的軍隊皆駐紮在城外三十里，堅壁而勿開戰，等待秦州、雍州等地的叛亂後，再合兵一起攻下二地。

九月，在王鑒等人斬殺苻雙、苻武之後，與王猛等將會合，攻破蒲阪後斬殺苻柳及其妻。隨後王猛屯駐在蒲阪，派遣鄧羌與王鑒等和楊安等人會合一起攻打陝城。

十二月，陝城城破，魏公苻廋被擒獲後送到苻堅面前，在問完後將其賜死，魏公由苻廋長子承襲，其餘六子皆封縣公。

滅燕之戰

東晉晉廢帝|廢帝(東晉)|太和五年（370年）

四月，派遣尚書令、太子太傅王猛率領包含鎮南將軍楊安等十位將領和六萬兵馬前往征伐前燕

七月，王猛前往攻打壺關，楊安則負責攻打晉陽。

八月，前燕幽帝慕容暐命令太傅、上庸王慕容評統率朝廷內外的精兵三十萬前去抵抗前秦。隨後王猛很快攻下壺關，並且活捉前燕上黨太守南安王慕容越，周邊郡縣無不望風而降，燕人大為震恐。

九月，因為晉陽兵多糧足，歷經兩個月的攻打，楊安未能攻下。王猛便讓屯騎校尉苟長戍守在壺關，自己帶兵前來幫助楊安攻打晉陽。王猛隨後挖掘地道，讓虎牙將軍張蚝率領數百軍士從地道潛入晉楊城中，大聲高喊地斬殺關口士卒，引外頭的秦兵進城。而後前秦軍隊成功攻下晉陽，擒拿住前燕并州刺史、東海王慕容莊。

十月，王猛率眾將在潞川一帶與慕容評決戰，前燕軍隊大敗，被前秦軍俘斬五萬餘人，隨後更是乘勝追擊，殺死和投降之人又有十萬餘人，慕容評單騎逃走返回鄴城。

十一月，慕容暐被前秦游擊將軍郭慶在高陽擒獲，前燕便投降前秦，立國34年。楊安也因此場戰功，被苻堅封爵為「博平縣侯」

仇池攻伐

東晉晉廢帝|廢帝(東晉)|太和六年（371年）

前一年，篡奪其父仇池公之位的第六代仇池公楊俊之子第七代仇池公楊世過世，而後由其子楊纂繼位，並且自立與前秦斷絕稱臣的關係。不僅如此，楊纂的叔父武都太守楊統起兵與其爭權，爆發內亂。

二月，苻堅任命原為吏部尚書的楊安為使持節、都督益、梁州諸軍事、梁州刺史。

三月，苻堅派遣楊安與西縣侯苻雅、益州刺史王統、并州刺史徐成、羽林左監朱肜、揚武將軍姚萇率領步騎兵七萬人前往討伐第八代仇池公楊纂。

四月，當前秦軍隊到達鷲峽，楊纂帶著五萬兵馬前來抵禦前秦大軍，東晉的梁州刺史楊亮也派遣督護郭寶、卜靖二人率領千餘騎兵前來為楊纂助陣。兩方在峽中大戰，楊纂大敗，死者多達十之三四，郭寶等將也喪命於此。隨後楊纂收攏敗兵後逃回仇池。西縣侯苻雅苻雅接著猛攻仇池，楊統便率武都之眾投降前秦，楊纂見此甚是畏懼，便雙手被反綁在背後而面向前的向前秦請降，苻雅便將楊纂送往長安。楊安也因此功被加都督南秦州諸軍事，鎮守仇池之地。

南取梁益

東晉晉孝武帝|孝武帝寧康元年（373年）

八月，東晉梁州刺史楊亮派遣他的兒子楊廣率兵襲擊仇池之地，時任前秦梁州刺史的楊安與其作戰，成功擊敗楊廣，東晉沮水一代的各守將聽聞此事皆棄城逃散。楊亮聞此消息亦十分畏懼，隨即率軍退守磬險。

九月，楊安隨即率兵反攻漢川。

十月，前秦天王苻堅派遣益州刺史王統、秘書監朱肜率領兩萬士兵進攻漢川，前禁將軍毛當、鷹揚將軍徐成則率領三萬士兵進攻劍門（今四川劍閣東北），以取東晉的梁、益之地。東晉梁州刺史楊亮率領巴蜀少數民族組成的部隊(巴獠)萬餘人前來抵禦前秦的進攻，兩軍在青谷(今陝西省洋縣東北)發生決戰。楊亮兵敗，逃往魏興郡西城縣（今陝西安康西北）。朱肜隨後攻陷漢中，徐成則攻下劍門。

楊安則率兵進攻梓潼，梓潼太守周颺率軍固守涪城，遣步騎兵數千人護送其母和妻子自漢水到江陵，朱肜率軍邀擊而將二人擒獲，周颺見此情形便向楊安投降。

十一月，楊安成功攻克梓潼。東晉荊州刺史桓豁派遣江夏相竺瑤率兵前往救助梁、益的東晉軍隊。當竺瑤聽聞廣漢太守趙長戰死，便引兵退去。東晉益州刺史周仲孫遣兵在綿竹抵禦朱肜的軍隊，而後在聽聞毛當就要抵達成都時，周仲孫便率領騎兵五千人逃往南中。前秦於是取得東晉的梁、益二州，周邊諸民族如邛、莋、夜郎皆依附於前秦。苻堅於是任命楊安為右大將軍、益州牧，鎮守成都。毛當則被任命為益州刺史，鎮守漢中。姚萇則擔任寧州刺史，屯兵墊江；王統為南秦州刺史，鎮守仇池。

益州平亂

東晉晉孝武帝|孝武帝寧康二年（374年）

五月，蜀人張育、楊光起兵反抗前秦的統治，擁眾多達二萬人，並派遣使者到東晉朝廷來請求派兵支援。前秦天王苻堅聞此消息後，便派遣鎮軍將軍鄧羌率領五萬甲士前往討伐張育。東晉益州刺史竺瑤、威遠將軍桓石虔則率領三萬兵力攻打墊江來支援張育，姚萇與之交戰後兵敗，退守到五城並屯兵在那裡。隨後竺瑤、桓石虔便屯兵在巴東。張育接著自號為蜀王，與巴獠的酋帥張重、尹萬合兵五萬餘人進攻並且包圍成都城。

六月，張育改元為黑龍。

七月，張育與張重等人為了爭奪權力，各自舉兵相互攻伐，內亂爆發。前秦右大將軍、益州牧楊安、鎮軍將軍鄧羌見此情況便領兵襲擊張育，隨後張育敗退，張育與楊光便率兵退守至綿竹一帶。

八月，前秦鎮軍將軍鄧羌在涪西擊敗東晉軍隊。

九月，前秦右大將軍、益州牧楊安率軍在成都以南擊敗張重、尹萬，兵且成功擊殺張重，一戰斬首蜀軍二萬三千級。前秦鎮軍將軍鄧羌亦在綿竹擊敗張育、楊光之軍，二人皆被斬之。益州之亂遂平定了下來。

合攻襄陽

東晉晉孝武帝|孝武帝(東晉)|太元三年（378年）

二月，前秦天王苻堅派遣征南大將軍、都督征討諸軍事、守尚書令、長樂公苻丕，武衛將軍苟萇和尚書慕容暐率領七萬步騎兵進攻東晉所屬的襄陽地區，並以右大將軍、荊州刺史楊安率領樊州、鄧州的士兵作為前鋒，征虜將軍石越率領精銳其兵一萬從魯陽關出發，京兆尹慕容垂、揚武將軍姚萇率領五萬士兵從南鄉出發，領軍將軍苟池、右將軍毛當、強弩將軍王顯率領四萬士兵從武當出發，一同會合後攻打襄陽城。

此後歷史上再無楊安的記錄，但淝水之戰中並未見到楊安的消息，因此可推測楊安可能死於淝水之戰以前。

Early life

Yang An's background is one of contradiction and uncertainty. Prior to his first military act serving Former Qin in 366, there was a crisis in Chouchi back in 356 involving a prince who fled to Qin whose name was also Yang An. If it is to believe that they for the same people, Yang An was a prince of the Di state Chouchi whose father, Yang Guo (楊國) was its Duke. Yang Guo came to power in 355, after his father Yang Chu (楊初) was killed by his uncle Yang Songnu (楊宋奴). Yang Guo avenged his father and claimed his title of duke. The Jin dynasty Grand Marshal, Huan Wen, petitioned him to be given appointments while Yang An was appointed as Administrator of Wudu. Just a year into his reign, Yang Guo would be assassinated by his nephew Yang Jun (楊俊), who usurped his position and caused Yang An to flee to Qin.

The Book of Song shows that Yang Jun remained Duke until his death in 360 and was succeeded by his son Yang Shi (楊世). There was an attempt to call back Yang An to the state by Yang Jun but what became of this was not known. However, the Book of Wei provides a different account, as it states that Yang An actually killed Yang Jun right after his father's assassination in 356. Yang An then took the throne and also died in 360. He was succeeded by Yang Shi, who this time appears to be An's son, not Jun's.

Service under Fu Jian

Early career

Regardless of his background, what was clear is that Yang An's first appearance under Qin would be in 365, during the Xiongnu rebellion of Liu Weichen and Cao Gu. Yang An led the vanguard together with Mao Sheng (毛盛) while Fu Jian personally campaigned against Cao Gu. Yang An defeated Cao Gu's army and killed his brother, Cao Huo (曹活), forcing Cao Gu to surrender back to Fu Jian while Weichen was captured by Deng Qiang.

In 366, Yang An, Wang Meng and Yao Chang attacked Nanxiang Commandary (南鄉) in Jingzhou, and Jin in response sent Huan Huo to push them back. As Huan Huo reached Xinye, the three generals withdrew, claiming more than ten thousand households north of the Han River.

The following year, the independent warlord in Liangzhou, Li Yan (李儼) was attacked by Former Liang. After asking for help, Fu Jian sent Yang An to reinforce Li at Fuhan (枹罕縣; in present-day Linxia County, Gansu). The situation was resolved after Wang Meng defeated Zhang Tianxi's army near Fuhan and convinced him to withdraw his troops. Thus, no territories were lost between Qin and Liang while Li Yan was moved to Chang'an.

In 368, Yang An participated in quelling the rebellion of Fu Liu (苻柳), Fu Shuang (苻雙), Fu Sou (苻廋) and Fu Wu (苻武). Yang An and Zhang Ci were tasked in facing Fu Sou at Shancheng (陝城, in modern Sanmenxia, Henan) but were ordered by Fu Jian to stack up their supplies and avoid battle first until Fu Shuang and Fu Wu were defeated. Following the defeats of Liu, Shuang, and Wu, Fu Sou was the last of the rebels that Qin had to deal with. Yang An and Zhang Ci received reinforcements in the form of Wang Jian (王鑒) and Deng Qiang sent by Wang Meng. Together, they captured Fu Sou and Shancheng, ending the rebellion as a whole.

Conquest of Former Yan

War broke out between Former Qin and its rival state, Former Yan in 370. While Wang Meng was heading the campaign, Fu Jian sent Yang An, who was serving as General Who Guards the South at the time, with 60,000 troops to reinforce Wang. Yang An laid siege on Jinyang (晉陽, in modern Taiyuan, Shanxi) but he could not overcome the city's defenses. When Wang Meng arrived to help after capturing Huguan, the two devised a plan to have Zhang Ci infiltrate the city. They dug tunnels under the walls of Jinyang and sent Zhang Ci with a few hundred men into the city to open the gates. After Zhang Ci did so, Wang Meng and Yang An's forces flooded the city and captured its defender Murong Zhuang. After Qin conquered Yan, Yang An was made Marquis of Boping County.

In 371, Fu Jian handed out a number of positions to his officials and officers including Yang An. Yang, who was the Supervisor of the Masters of Writing, was made Commissioner Bearing Credentials, Chief Controller of Yizhou and Liangzhou, and Inspector of Liangzhou.

Campaigns in western China

In 371, Yang An led a campaign into Chouchi. The Duke of Chouchi, Yang Cuan (楊纂) personally led his army against him with assistance from the Jin dynasty. However, Yang An greatly routed them, killing many of the enemy troops, so Cuan retreated. As Qin forces under Fu Ya (苻雅) approached the capital, Yang Cuan's uncle Yang Tong (楊統) led his followers to surrender. Yang Cuan followed suit and Chouchi was conquered. Yang An relocated the people to Guanzhong, leaving the region around Chouchi emptied as a result. Southern Qinzhou was added into his command and he stationed himself in Chouchi. In 373, the Jin general Yang Guang (楊廣) tried to conquer the region but was repelled by Yang An who then harassed the Han River.

The same year, Fu Jian intended to conquer Yizhou and Liangzhou. Yang An was tasked in taking over Zitong Commandary, defended by its Administrator Zhou Xiao. Zhou Xiao defended hard but made the mistake of sending his wife and mother to Jiangling. They were intercepted by the Qin general Zhu Yong (朱肜), so Zhou Xiao, not wanting to risk their lives, quickly surrendered to Yang An. After the conquest, Yang An was appointed as Governor of Yizhou.

The following year, a rebellion arouse in Shu, headed by Zhang Yu (張育) and Yang Guang (楊光). Zhang Yu's regime was supported by the Jin, who helped him defeat Yao Chang, but although he lasted long enough to declare himself King of Shu, his followers started turning on each other and the rebels were disorderly. Yang An, with the aid of Deng Qiang defeated Zhang Yu who fell back to Mianzhu. Yang An then routed Zhang Yu's subordinates Zhang Zhong (張重) and Yin Wan (楊光) south of Chengdu while Deng Qiang killed Zhang Yu and Yang Guang, putting an end to the revolt.

Siege of Xiangyang

Yang An would last appear in 378, holding the position of Inspector of Jingzhou. During Fu Jian's great siege of Xiangyang, Yang An and Deng Qiang attacked Fancheng. Yang An seemed to have died during or shortly after the campaign as nothing is recorded of him from this point on. His position of Inspector of Jingzhou was given to Liang Cheng (梁成) at the beginning of 379 following Xiangyang's fall.