第二百六十四章 再挫敌锋(1 / 2)

所谓“地听”,又叫“瓮听”。战国时期的作品《墨子》中有载:当发现敌人挖掘地道攻城的时候,在城中靠近城墙的部位往下挖出井来。

然后,在井中放一个瓮口蒙了薄牛皮的瓮,让听力敏锐之人伏在上面,监听地下的动静。

虽然古代人不懂其中原理,张顺好歹接受过后世高等教育,一听便明白怎么回事了。这不就是泥土这种传播介质比空气要快,衰减要慢的原理嘛。

于是,他便早早的命人在紫微星堡里面多处挖了干井,放了陶瓮以备攻城者挖掘地道,没想到这里派上了用场。

话说那古代挖地道也是个技术活,一个要保证地道不会挖偏了,一个要保证地道不会在挖掘中倒塌了,非专业人士不能为之。

好在五省总督洪承畴也知道这一次官兵围剿“顺贼”,定然也避不开攻城之事。所以他早早招募了挖掘人员,备下木头,以防万一,没想到还真派上了用场。

每当在地下每挖掘一段地道以后,洪承畴便连忙让士卒用木头搭起架子来,防止地道坍塌。

而且挖出来的泥土也需要士卒用篮子、箩筐装了,一点一点的从地道里面背出来。虽然速度很慢,胜在流汗不流血,也算安全。

义军当然不能对此事坐视不理,张顺便连忙派出曹文诏、曹变蛟、乱世王和萧擒虎四营出击。

这四营人马根据张顺指挥,从紫微星堡右侧绕过去击官兵左侧。正好与甘肃总兵柴时华,临洮总兵王承恩对阵。

原本那甘肃总兵柴时华和临洮总兵王承恩亦是宿将,早已经严阵以待,护卫在挖掘地道士卒的左侧。

哪成想曹文诏、曹变蛟、乱世王和萧擒虎四营来到紫微星堡左侧以后,只向前推进了二百步,便再也不肯向前了。

甘肃总兵柴时华和临洮总兵心中倒是一喜,只道是义军不敢向前邀战。

却不意曹文诏、曹变蛟等人左右分开,只见阵中数百匹骡马拖拽出五六十门大炮来。

原来,张顺早命李十安带领他麾下的“飞骑铁炮”藏于阵中。他利用义军火炮重量轻、机动性强、编制有利于迅速展开和射击的优势,故意欺负对面轻炮射程威力不及义军,重炮沉重无法及时展开的劣势进行攻击。

官兵挖掘地道之处距离紫微星堡不过四百步左右,原本城堡里面的火炮也不是不能够着,就是距离太远了。城堡中的火炮射出来的炮弹,几乎毫无威胁。

可是当这些野战炮在城堡外二百步展开的时候,那么距离官兵挖掘地道的地道口也只有一百余步至二百步左右,顿时火炮的威胁大增。

还未等的柴时华和王承恩想出对策,李十安麾下的第二炮兵团早已经展开了火炮,向护卫在挖掘地道士卒前面的官兵发动了射击。

李十安将这六十门火炮分为三组,以每组二十门为单位进行轰击。顿时,一片炮弹飞入到官兵阵中,一阵哀嚎、惨叫声响了起来。

甘肃总兵柴时华和临洮总兵王承恩没有办法,只好命士卒再往后退一退,以免处于被动挨打的局面。

可是身后就是挖掘地道的入口了,官兵又能够退到哪里呢?有一阵炮声响起,随即又无情的打倒了几十人。

飞溅的血腥低落到年轻的总兵柴时华脸上,他用手摸了摸,摸了一手鲜血。

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