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.
smyru
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Very interesting!
reach: rather country specific20th centuryhistory of PolandPolandwars

Answers by country

Germany
Japan
Ukraine
USSR
answers
flagFrance
0%
92%
0%
7%
14
flagBelarus
10%
82%
6%
0%
29
flagItaly
6%
80%
0%
13%
15
flagSpain
12%
79%
8%
0%
24
flagRepublic of Ireland
6%
72%
10%
10%
29
flagthe Netherlands
23%
70%
5%
0%
17
flagAustria
20%
70%
0%
10%
10
flagGreece
16%
66%
5%
11%
18
flagGermany
10%
61%
11%
16%
77
flagPoland
20%
54%
15%
8%
15261
flagSweden
18%
54%
27%
0%
11
flagAustralia
24%
52%
0%
24%
25
flagLithuania
17%
47%
5%
29%
17
flagthe United Kingdom
31%
44%
12%
11%
145
flagUnknown
42%
42%
14%
0%
14
flagIndia
29%
37%
12%
16%
24
flagthe United States
33%
36%
16%
12%
111
flagUkraine
31%
31%
18%
18%
16
flagCanada
25%
30%
10%
30%
20