Question: What year did the country that includes the birth city of Bodindecha form an alliance with Japan?

Knowledge 1: Bodindecha
Chao Phraya Bodindecha (, , 1777–1849), personal name Sing Sinhaseni (), was one of the most prominent political and military figures of the early Bangkok Rattanakosin Kingdom. Bodindecha was both a top military general () and Chief Minister in charge of civilian affairs as the "Akkhra Maha Senabodi" () of the "Samuha Nayok" ) during the reign of King Rama III. He was known for putting down the Laotian Rebellion (1826–1828} (ปราบกบฎ) of Lord Anouvong of Vientiane (เจ้าอนุวงศ์ เวียงจันทน์) and for campaigns during the Siamese-Vietnamese Wars of 1831–1834 and 1841–1845. [SEP] Knowledge 2: Pacific War
The Axis states which assisted Japan included the authoritarian government of Thailand in World War II, which quickly formed a temporary alliance with the Japanese in 1941, as the Japanese forces were already invading the peninsula of southern Thailand. The Phayap Army sent troops to invade and occupy northeastern Burma, which was former Thai territory that had been annexed by Britain much earlier. Also involved were the Japanese puppet states of Manchukuo and Mengjiang (consisting of most of Manchuria and parts of Inner Mongolia respectively), and the collaborationist Wang Jingwei regime (which controlled the coastal regions of China). [SEP] Knowledge 3: Bang Bon District
Bang Bon (Thai: บางบอน, pronounced [bāːŋ bɔ̄ːn]) is one of the 50 districts (khet) of Bangkok, Thailand. Its neighbours, clockwise from north, are Bang Khae, Phasi Charoen, Chom Thong, and Bang Khun Thian districts of Bangkok, Mueang Samut Sakhon District and Krathum Baen District of Samut Sakhon Province, and Nong Khaem District of Bangkok.
Knowledge 1: Bodindecha
Chao Phraya Bodindecha (, , 1777–1849), personal name Sing Sinhaseni (), was one of the most prominent political and military figures of the early Bangkok Rattanakosin Kingdom. Bodindecha was both a top military general () and Chief Minister in charge of civilian affairs as the "Akkhra Maha Senabodi" () of the "Samuha Nayok" ) during the reign of King Rama III. He was known for putting down the Laotian Rebellion (1826–1828} (ปราบกบฎ) of Lord Anouvong of Vientiane (เจ้าอนุวงศ์ เวียงจันทน์) and for campaigns during the Siamese-Vietnamese Wars of 1831–1834 and 1841–1845. [SEP] Knowledge 2: Pacific War
In September 1940, Japan decided to cut China's only land line to the outside world by seizing Indochina, which was controlled at the time by Vichy France. Japanese forces broke their agreement with the Vichy administration and fighting broke out, ending in a Japanese victory. On 27 September Japan signed a military alliance with Germany and Italy, becoming one of the three Axis Powers. In practice, there was little coordination between Japan and Germany until 1944, by which time the U.S. was deciphering their secret diplomatic correspondence. [SEP] Knowledge 3: Bang Bon District
Bang Bon (Thai: บางบอน, pronounced [bāːŋ bɔ̄ːn]) is one of the 50 districts (khet) of Bangkok, Thailand. Its neighbours, clockwise from north, are Bang Khae, Phasi Charoen, Chom Thong, and Bang Khun Thian districts of Bangkok, Mueang Samut Sakhon District and Krathum Baen District of Samut Sakhon Province, and Nong Khaem District of Bangkok.
Knowledge 1: Bodindecha
Chao Phraya Bodindecha (, , 1777–1849), personal name Sing Sinhaseni (), was one of the most prominent political and military figures of the early Bangkok Rattanakosin Kingdom. Bodindecha was both a top military general () and Chief Minister in charge of civilian affairs as the "Akkhra Maha Senabodi" () of the "Samuha Nayok" ) during the reign of King Rama III. He was known for putting down the Laotian Rebellion (1826–1828} (ปราบกบฎ) of Lord Anouvong of Vientiane (เจ้าอนุวงศ์ เวียงจันทน์) and for campaigns during the Siamese-Vietnamese Wars of 1831–1834 and 1841–1845. [SEP] Knowledge 2: Bang Bon District
Bang Bon (Thai: บางบอน, pronounced [bāːŋ bɔ̄ːn]) is one of the 50 districts (khet) of Bangkok, Thailand. Its neighbours, clockwise from north, are Bang Khae, Phasi Charoen, Chom Thong, and Bang Khun Thian districts of Bangkok, Mueang Samut Sakhon District and Krathum Baen District of Samut Sakhon Province, and Nong Khaem District of Bangkok. [SEP] Knowledge 3: Great power
Over time, the relative power of these five nations fluctuated, which by the dawn of the 20th century had served to create an entirely different balance of power. Some, such as the United Kingdom and Prussia (as the founder of the newly formed German state), experienced continued economic growth and political power. Others, such as Russia and Austria-Hungary, stagnated. At the same time, other states were emerging and expanding in power, largely through the process of industrialization. These countries seeking to attain great power status were: Italy after the Risorgimento, Japan after the Meiji Restoration, and the United States after its civil war. By the dawn of the 20th century, the balance of world power had changed substantially since the Congress of Vienna. The Eight-Nation Alliance was a belligerent alliance of eight nations against the Boxer Rebellion in China. It formed in 1900 and consisted of the five Congress powers plus Italy, Japan, and the United States, representing the great powers at the beginning of 20th century.

Answer: 1941