There are a lot of warlords at the end of Qing dynasty and during the republic of china. Just like the Three Kingdoms except with guns.

I found the names of the warlords on Wikipedia:

Major Factions

Northern factions

Major Cliques
Anhui clique 皖系

Duan Qirui 段祺瑞
Xu Shuzheng 徐樹錚
Lu Yongxiang 盧永祥
Ni Sichong 倪嗣沖
Cu Tongfeng 曲同豐
Wu Guangxin 吳光新
Jin Yunpeng 靳雲鵬
Duan Zhigui 段芝貴
Zhang Jingyao 張敬堯
Zhili clique 直系

Feng Guozhang 馮國璋
Cao Kun 曹錕
Wu Peifu 吳佩孚
Sun Chuanfang 孫傳芳
Lu Jianzhang 陸建章
Li Chun 李純
Wang Zhangyuan 王占元
Chen Guangyuan 陳光遠
Feng Yuxiang 馮玉祥
Qi Xieyuan 齊變元
Wang Chungbin 王承斌
Fengtian clique 奉系

Zhang Zuolin 張作霖
Zhang Xueliang 張學良
Zhang Zuoxiang 張作相
Zhang Zongchang 張宗昌
Wan Fulin 万福麟
Zang Shiyi
Wu Junsheng 吳俊陞
Guo Songling 郭松齡
Yang Yuting 楊宇霆
Zhu Yupu 祩玉樸
Tang Yulin 湯玉麟



Minor Cliques
Guominjun 國民軍

Feng Yuxiang 馮玉祥 (former Zhili clique)
Hu Jingyi 胡京伊
Sun Yue 孙玉鹗
Shanxi clique 晉系

Yan Xishan 閻錫山
Xinjiang clique

Yang Zengxin 楊增新
Jin Shuren 金樹仁
Sheng Shicai 盛世才
Ma clique 馬家軍

Qinghai
Ma Qi 馬麒
Ma Lin
Ma Bufang 馬步芳
Ma Buqing 馬步青
Ningxia
Ma Hongbin 馬鴻賓
Ma Hongkui 馬鴻逵
Gansu
Ma Zhongying 馬仲英



Newer Factions
Hebei

Song Zheyuan 宋哲元 (former Guominjun)
Henan

Bie Tingfang 別廷芳
Rehe

Tang Yulin 湯玉麟 (former Fengtien)
Sun Dianying 孫殿英 (former Guominjun)
Shaanxi

Jing Yuexiu 井岳秀
Suiyuan

Fu Zuoyi 傅作義 (former Shanxi clique)
Shandong

Han Fuqu 韓復榘



Southern factions
Yunnan clique 滇系

Cai E 蔡鍔
Tang Jiyao 唐繼堯
Long Yun 龍雲
Old Guangxi Clique 桂系

Lu Rongting 陸榮廷
Lin Hu
Tan Haoming 譚浩明
Shen Hongying 沈鴻英
Chen Binghun 陳炳焜
New Guangxi Clique 新桂系

Li Zongren 李宗仁
Huang Shaoxiong 黃紹竑
Bai Chongxi 白崇禧
Kuomintang (KMT) 中國國民黨

Sun Yatsen孫逸仙
Chiang Kaishek蔣介石
Hu Hanmin胡漢民
Wang Jingwei汪精衛
Liao Zhongkai廖仲凱
He Yingqin何應欽
Sichuan clique

Liu Xiang 劉湘
Yang Sen 楊森
Deng Xihou鄧錫侯
Tian Songyao田頌堯
Sichuan / Xikang

Liu Wenhui 劉文輝



Minor Southern Factions
Guangdong

Chen Jiongming 陳炯明
Chen Jitang 陳濟棠
Zhang Fakui 張發奎
Fujian

Chiang Kuang-Nai 蔣光鼐
Guizhou

Liu Xianshi 劉顯世
Wang Jialie 王家烈
Hunan

Tan Yankai 譚延闓
Zhao Hengti 赵恒惕
Tang Shengzhi 唐生智
Jiangxi

Lu Diping 魯滌平

How did these warlords get their weapons and raise their army? How did the warlords attract men to them and get their wealth from?

many of them are former Qing Bei Yang navy leftover generals thats how they are able to get their hands on weapons, more Bei Yang navy leftovers.

How did they manage the economy in the areas that they controlled?

Did they trade with each other at the "national" level or the merchants did the trading?

Did they allow merchants to travel freely to other warlords controlled area and did they allow merchants from other areas to enter their territory easily?

Did the warlords issue passports to their people?

If at first, the warlords did not have a territory, how did they carve out an area for themselves? Maybe could quote couple of examples?

What was the army strength of each warlord?

Which warlords controlled the agriculture lands of China?

The word 'attarct' implies some kind of voluntary decision, whereas i am sure that some soldiers were coerced to fight, due to the dominance of the landlord and warlord class. Nice questions to be asking though.