Caesarさんのイラストまとめ

Soviet Project 665/Whiskey Long-Bin submarine

American Brilliant Pebbles Space-Based Ballistic Missile Interceptor

Swedish experimental NIVA XM1970 infantry assault weapon with 45mm rocket launcher & 5.56mm rifle

German planned Messerschmitt Bf.109W sea fighter

In the 1960s, Americans envisioned future weapons. Various mobile SPHs.

Some American planned SPAAGs during the Cold War based on M-551 light tank & Bradley IFV

Soviet СУ-30/31/32 SU-30/31/32 truck mounted howitzer in 1930's.

American planned Landing Craft Utility-Folding（LCU-F）

The Italian Grillo torpedo boat with tracks,it can climb over the torpedo net to attack coastal targets.

During the WWII, the Japanese Imperial Army in China lacked tanks. They used the bicycle and plywood to make the Type 98 tank "Hana" / Flower, which quickly became garbage after fighting the Soviet Army.