In XX century Poland declared war only once. On which country?
Germany
Japan
Ukraine
USSR
Poland declared war on Japan on 20th December 194 as most of WW2 allies. Though Empire of Japan refused to accept a state of war due to friendly relations between the two countries. Despite that legally the state of war lasted until 8th February 1957. It might be the longest war without any clash.
reach: rather country specific20th centuryhistory of PolandPolandwars
Answers by country
Germany
Japan
Ukraine
USSR
answers
France
19
Belarus
35
the Netherlands
25
Austria
13
Italy
20
Spain
31
Germany
149
Greece
22
Republic of Ireland
48
Poland
17206
Australia
26
Sweden
13
Lithuania
18
Czech Republic
12
Unknown
14
the United Kingdom
225
the United States
166
Canada
36
India
39
Ukraine
18