who were fighting the war where the 152 mm towed gun-howitzer m1955 was used ?
SELECT DISTINCT COUNT attr_open var_uri attr_close where brack_open dbr_152_mm_towed_gun-howitzer_M1955_ attr_open D-20 attr_close dbo_usedInWar var_x sep_dot var_x dbo_territory var_uri sep_dot var_x a dbo_MilitaryConflict brack_close