متحدين نقف، متفرقين نسقط

[HotIcyDonut]

I stumbled upon the following phrase:

متحدين نقف، متفرقين نسقط

Is تقديم الحال like this really acceptable in Arabic? Or it's a calque from English?

شكراً مقدماً

 

[elroy]

I don't think these are fronted حال’s. نقف متحدين، نسقط متفرقين would not mean the same thing.

The translation does sound calque-y to me.

In my opinion a more natural Arabic version would be
إن اتّحدنا نقف، إن تفرّقنا نسقط

Or you could use the past tense in the apodosis, it might be more بليغ:
إن اتّحدنا وقفنا، إن تفرّقنا سقطنا

To your general question:

I think generally speaking adverbial accusatives can be fronted (أمامًا نسير), but I’m not sure it’s common with حال’s.

 

[Mahaodeh]

but I’m not sure it’s common with حال’s.

I don’t know about common, but it’s grammatically correct in a verbal sentence:
خُشَّعًا أَبْصَارُهُمْ يَخْرُجُونَ مِنَ الْأَجْدَاثِ كَأَنَّهُمْ جَرَادٌ مُّنتَشِرٌ - سورة القمر

However, there are cases when it’s not allowed.