Hi, today I would like to suggest a new campaign : Second Sino-Japanese War (日中戦争/抗日戦争). From 1939, the Chinese Army has hesitate to carry out large-scale operations except for the Hong Kong Defense Operation, so I limited to 1937-1938.
Units involved
Japan 
- Imperial Japanese Marines (海軍陸戦隊)
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Imperial Japanese Army (大日本帝国陸軍)
- Shanghai Expeditionary Army(上海派遣軍)
→In February 1938, integrated into Central China Expeditionary Army (中支那派遣軍) - 10th Army (第10軍)
→In February 1938, integrated into Central China Expeditionary Army (中支那派遣軍) - 2nd Army (第2軍)
- Shanghai Expeditionary Army(上海派遣軍)
China 
- Chinese National Revolutionary Army (国民革命軍)
Combat zone
-
Battle of Shanghai (第二次上海事変─August 1937-November 1937)
The war began from this battle. See my friend’s post for more information on the Battle of Shanghai↓
Suggetion for East-Asian War: The Shanghai Campaign -
Landing to kinmen island (金門島上陸作戦─October 1937)
This operation was planned by Japanese Navy to block river and marine traffic.
Battles of Kinmen Island and Amoy Island are landing operations from sandy beaches., so you will be able to design games like the Normandy campaign. -
Battle of Nanjing (南京攻略戦─December 1937)
It was a battle over the capital Nanjing, which was a fortified city. Note that it was a siege, not an urban warfare. -
Battle of Xuzhou (徐州会戦─April 1938-June 1938)
The National Revolutionary Army blew up the Yellow River embankment at midnight. The Japanese army has decided to suspend the pursuit to rescue isolated troops and refugees. -
Landing to Amoy island (厦門島上陸作戦─May 1938)
This operation was planned by Japanese Navy to block river and marine traffic. -
Battle of Wuhan (武漢会戦─June 1938-October 1938)
Wuhan was Chinese largest heavy industry zone, but due to the decision to abandon it, only the 1st and 2nd Group Army (Ⅸ WarZone) remained when the Japanese troops arrived.
Firearms
Japan
Rifle
-
Arisaka Type 38 rifle (三八式歩兵銃)
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Arisaka Type 38 carbine (三八式騎銃)
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Arisaka Type 44 carbine (四四式騎銃)
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Vz.24 (モ式小銃Ⅲ型)
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Arisaka Type 35 Navy rifle (三五年式海軍銃)
Rifle grenade
- Arisaka Type 38 rifle with Type 91 grenade launcher (九一式擲弾器付き三八式)
Rare rifle
- Arisaka Type 30 rifle (三十年式歩兵銃)
This old type rifle Used for training during the Second Sino-Japanese War. - Murata Type 22 rifle (二二年式村田連発銃)
This old type rifle Used for training during the Second Sino-Japanese War. - Ko-go trial rifle (試製自動小銃甲号)
Japanese Pidersen copy Trials rifle - Otsu-go trial rifle (試製自動小銃乙号)
Japanese Copy ZH-29 - Hei-go trial rifle (試製自動小銃丙号)
Japanese Gas-operated Pedersen Rifle
Submachine gun / Shotgun
- Full-Automatic C96
- MP-28(7.63×25mm,20-rounds)
- Browning Auto-5
- S1-100(7.63×25mm,32-rounds) (ス式機関短銃)
- SIG model1920 with 50-rounds magazine (べ式機関短銃)
Rare SMG
- Type 2 experimental submachine gun (試製二型機関短銃)
Light machine gun
- Type 11 Light Machine Gun (十一年式軽機関銃)
- Lewis Gun
- Type 91 Vehicle-Maunted Light Machine Gun (九一式車載軽機関銃)
- ZB-26
Rare LMG
- Test Type Ultralight Machine Gun (試製超軽機関銃)
- Type 38 Machine Gun (三八式機関銃)
Handgun
- Type 26 revolver
- Mauser C96
- Type 94 pistol
- FN M1910
- Type 14 pistol
Mortor
-
Type 10 mortor (十年式擲弾筒)
-
Type 89 “Knee” mortor (八九式重擲弾筒)
If you shoot with your knee, your leg will break.
China
Rifle
-
Hanyang Type 88 rifle / Gewehr 1888 (漢陽八八式歩槍)
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Hanyang carbine
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Hanyang Type 79 rifle (漢陽七九式歩槍)
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Mauser Standerdmodel (中正式歩槍)
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Vz.24
-
Liao Type 13 (一三式歩槍)
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Type 4 rifle (四年式歩槍)
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FN Model 1930 (二一式歩槍)
Rifle grenade
- Lebel M1886 with Brandt Mle 31 Rifle grenade
Yunnan clique (雲南派) inported them from France.
Rare rifle
- ZH-29
- ZH-32
- General Liu rifle (劉慶恩自動歩槍)
- Gewehr1871
- “Jingal” wall gun
A prehistoric rifle manufactured in 1896 (光緒丙申年). - Type 3 rifle (宣統三年式歩槍)
licensed Production of the mauser M1896. A small number were produced at the Shanghai arsenal during the Qing dynasty.
Submachine gun
- Full-Automatic C96
- Thompson M1928(7.63×25mm,20-rounds)
- S1-100(7.63×25mm,32-rounds)
- Thompson M1928(7.63×25mm,30-rounds)
- Tsing tao Type16 Submachinegun (青島海軍工廠製MP-18,50-rounds)
Rare SMG
- Mauser M1896 carbine
Light machine gun
- Madsen light machine gun
- Hotchkiss Mle 22
- Sig KE7
- FN Mle D
- ZB-26
Rare LMG
- Type 17
Copy of Japanese Type 11. - Lahti-Saloranta M/26
Handgun
- Mauser C96
- FN M1900
- Ruby Pistol
Mortor
- MAM Guerilla mortor (French 37mm mortor)
Yunnan clique (雲南派) inported them from France. - Brandt Mle 1935 (French 60mm mortor)
Yunnan clique (雲南派) inported them from France. - Warlord light Morotor (Maybe 41mm?)
Actually, neither army had flamethrowers, sniper rifles, or anti-tank rifles at the time. As for the National Revolutionary Army, it is possible that they had a very small number of Remington M30s.
Vehicles
Japan
Tanks
-
Type 94 light aromored car TK (九四式軽装甲車 TK)
Weapon: 6.5mm light machine gun
Mobility: 40km/h, 3.45t
Aromor: 8-12mm
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Type 89 medium tank (八九式中戦車)
Weapon: Type 90 57mm tank gun, 6.5mm light machine gun×2
Mobility: 25km/h, 11.9t
Aromor: 6-17mm -
Type 95 light tank (九五式軽戦車)
Weapon: Type 94 37mm tank gun, 6.5mm light machine gun×2
Mobility: 40km/h, 7.4t
Aromor: 6-12mm
Aircrafts
- Type 95 Fighter
- Type 93 Heavy Bomber
- Type 96 Carrier-based Fighter
- Type 96 Carrier Attack Bomber
China
Tanks
-
Vickers Carden-Loyd Mark 6 Machine-gun Carrier
Weapon: 7.7mm Vickers Heavy Machine-Gun
Mobility: 48km/h, 1.5t
Aromor: 6-9mm -
Renault FT
Weapon: Puteaux SA 18 37mm gun
Mobility: 7km/h, 6.5t
Aromor: 8-22mm -
Vickers 6-Ton Mk. E Type B
Weapon: 3 pdr (47mm) gun, 7.7mm Vickers Heavy Machine-Gun
Mobility: 35km/h, 7.3t
Aromor:19-25mm
Aircrafts
- Fiat CR.32
- Tupolev SB
- Curtiss BF2C Goshawk
- Boeing P-26 Peashooter
- Vultee V-11-G
