155 mm (6.1") is a common and NATO-standard artillery calibre.
Since the late 20th century, most NATO armies have centred on 155 mm weapons as having a good compromise between range and destructive power whilst having a single calibre simplifies logistics; leading to the obsolescence of calibres such as 175 mm and 203 mm – although some forces retain 105 mm guns for their portability. Russian/Soviet guns and those of other aligned countries tend to use 152 mm weapons in similar roles.
I looked at faith
I almost walked away
But I looked again
I found the nerve to close my eyes and say the words
To ask you in
And I heard no heavenly choir
No angels in whit attire
i got no amazing super hum omnipresent pow but....
CHORUS
I know You now
I know You now
I know You're in my heart
I know You now
Beyond the shadow of a doubt
I know You now
I look at peace, that once was out of reach
And now it's here
i read Your word that some believe is so absurd
But I hold dear, yea
'Cause You loved me with your dying breath
You saved me when You conquered death