AWM4, Sub-class 13/118 - 5th Australian Light Trench Mortar Battery

First World War Diaries - AWM4, Class 13 Artillery. Archival series AWM4 comprises the diaries of the Australian Imperial Force (AIF) created during the First World War. The war diaries generally consist of war diary or intelligence summary sheets located at the beginning of each diary which record the date of each entry, the unit's location, a summary of events and any remarks or references to appendices. The appendices, which make up the larger part of each diary, may include orders, despatches, instructions, reports, telegrams, and decisions taken; daily situation reports; staff duties; accounts of operations; changes in establishment or strength; and a summary of information received. The overall quality of the diaries can be variable and usually reflects the attitude of the unit's commanding office, and the skill and conscientiousness of the individual charged with compiling it. Numbering System: This series has a three part numbering system: the first number represents the broadest category, such as arm, service or corps a unit belonged to; the second number represents the particular unit; and the third number is a chronological identifier that represents the month and year for each diary.

第一次世界大战日记——AWM4档案第13类炮兵档案。
档案系列AWM4收录了澳大利亚帝国军（Australian Imperial Force, AIF）在第一次世界大战期间形成的战地日记。此类战地日记通常以战地日志或情报汇总表开篇，用以记录每篇日志的撰写日期、所属部队的部署位置、事件概要，以及与附录相关的备注或引用说明。作为单篇日记核心组成部分的附录，可涵盖各类作战指令、公文通报、训令、报告、电报及作战决议、每日态势报告、参谋履职记录、作战行动详述、编制或兵力变动情况，以及所获情报汇总。
此类日记的整体质量参差不齐，通常取决于部队指挥部门的重视程度，以及负责编纂人员的专业能力与履职尽责程度。
编号体系：该档案系列采用三段式编号规则：第一段编号代表部队所属的最宽泛类别，如兵种、勤务或军团；第二段编号对应具体部队；第三段编号为时间标识，用于标注每篇日记对应的月份与年份。