Smerdis and his forces were defeated by the Persians under Darius I.是什么意思？

Smerdis and his forces were defeated by the Persians under Darius I.

士马特斯和他的军队被大流士一世领导下的波斯打败.

and

conj. 和，与，而且，于是，然后，因此；

例句
I spend a lot on expensive jewelry and clothing...
我花很多钱购买昂贵的首饰和衣服。

his

pron. (he的所有格)他的，(he的物主代词)他的东西；det. 属于他的，用于名词前，自己的，指某人的，上帝的；

例句
He claimed that his parents had abandoned him...
他声称父母遗弃了他。

forces

n. 力( force的名词复数 )，武力，（社会）势力，气力；v. 强制( force的第三人称单数 )，强作，施强力于，促成早熟；

例句
Reports from Chad suggest that rebel forces are advancing on the capital...
来自乍得的报告显示叛军正向首都推进。

were

be的过去时复数和第二人称单数形式，有时代替 was,用于条件从句、动词 wish 之后等；

例句
Shops, houses, and vehicles were set ablaze.
店铺、房子和车辆全都陷于火海。

defeated

v. 击败( defeat的过去式和过去分词 )，战胜，挫败，使困惑；

例句
She defeated developers who wanted to bulldoze her home to build a supermarket.
她打败了那些想推倒她家房屋兴建超市的开发商们。

by

prep. 在…旁边，表示方式，由于，经过；adv. 经过，表示保留或保存时用，短暂拜访；

例句
...expensive make-up that we saw being advertised by a beautiful model...
我们所见的由一位漂亮模特代言的昂贵化妆品

the

art. 指已提到的人（物），指说话人与听者已知的人（物），用于独一无二的事物前，与形容词最高级和序数词连用；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

Persians

--

例句
Smerdis and his forces were defeated by the Persians under Darius I.
士马特斯和他的军队被大流士一世领导下的波斯打败.

under

prep. 在…下面，在表面之下，在…的假定表面或掩饰下，少于，小于，在…情况下；adv. 在下面，少于，在水下，在昏迷中；adj. 较低的，下面的；

例句
...efforts to acquaint the public with their rights under the new law...
为使公众熟悉新法律所赋予的权利而作出的努力

Darius

n. 大流士（古波斯帝国国王）；

例句
Throughout his school life Darius was tactless and egocentric...
上学期间，达赖厄斯粗鲁冒失，而且总以自我为中心。